/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:22:21,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:22:21,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:22:21,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:22:21,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:22:22,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:22:22,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:22:22,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:22:22,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:22:22,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:22:22,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:22:22,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:22:22,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:22:22,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:22:22,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:22:22,005 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:22:22,005 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:22:22,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:22:22,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:22:22,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:22:22,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:22:22,181 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:22:22,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-01-31 21:22:22,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fea858ef/3fec0820ffca4ed794cfc96bcd3f68dd/FLAGc00689358 [2022-01-31 21:22:22,551 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:22:22,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-01-31 21:22:22,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fea858ef/3fec0820ffca4ed794cfc96bcd3f68dd/FLAGc00689358 [2022-01-31 21:22:22,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fea858ef/3fec0820ffca4ed794cfc96bcd3f68dd [2022-01-31 21:22:22,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:22:22,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:22:22,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:22:22,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:22:22,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:22:22,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d582c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22, skipping insertion in model container [2022-01-31 21:22:22,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:22:22,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:22:22,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2022-01-31 21:22:22,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:22:22,694 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:22:22,707 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2022-01-31 21:22:22,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:22:22,719 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:22:22,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22 WrapperNode [2022-01-31 21:22:22,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:22:22,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:22:22,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:22:22,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:22:22,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:22:22,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:22:22,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:22:22,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:22:22,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (1/1) ... [2022-01-31 21:22:22,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:22:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:22:22,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 21:22:22,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 21:22:22,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:22:22,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:22:22,802 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:22:22,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:22:22,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:22:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:22:22,843 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:22:22,844 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:22:22,936 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:22:22,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:22:22,940 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 21:22:22,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:22:22 BoogieIcfgContainer [2022-01-31 21:22:22,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:22:22,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:22:22,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:22:22,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:22:22,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:22:22" (1/3) ... [2022-01-31 21:22:22,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630ec92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:22:22, skipping insertion in model container [2022-01-31 21:22:22,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:22" (2/3) ... [2022-01-31 21:22:22,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630ec92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:22:22, skipping insertion in model container [2022-01-31 21:22:22,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:22:22" (3/3) ... [2022-01-31 21:22:22,951 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2022-01-31 21:22:22,955 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:22:22,956 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:22:23,000 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:22:23,004 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:22:23,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:22:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:22:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:22:23,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:23,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:23,023 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-01-31 21:22:23,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:23,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399588116] [2022-01-31 21:22:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:23,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:23,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:23,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:23,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399588116] [2022-01-31 21:22:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399588116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:23,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:23,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:22:23,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948854234] [2022-01-31 21:22:23,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:23,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:22:23,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:22:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:22:23,167 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:23,201 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-01-31 21:22:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:22:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:22:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:23,209 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:22:23,210 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 21:22:23,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:22:23,217 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:22:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 21:22:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 21:22:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-31 21:22:23,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-01-31 21:22:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:23,252 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-31 21:22:23,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-31 21:22:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:22:23,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:23,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:23,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:22:23,254 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-01-31 21:22:23,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731281979] [2022-01-31 21:22:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:23,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:23,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:23,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731281979] [2022-01-31 21:22:23,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [731281979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:23,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:23,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 21:22:23,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688192924] [2022-01-31 21:22:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:23,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 21:22:23,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 21:22:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 21:22:23,348 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:23,384 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-01-31 21:22:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 21:22:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:22:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:23,385 INFO L225 Difference]: With dead ends: 24 [2022-01-31 21:22:23,385 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 21:22:23,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:22:23,389 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:23,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:22:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 21:22:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 21:22:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-31 21:22:23,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-01-31 21:22:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:23,400 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-31 21:22:23,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-31 21:22:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:22:23,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:23,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:23,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:22:23,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-01-31 21:22:23,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:23,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183287026] [2022-01-31 21:22:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:23,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:23,511 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:22:23,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:23,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183287026] [2022-01-31 21:22:23,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183287026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:23,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:23,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:22:23,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439390093] [2022-01-31 21:22:23,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:23,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:22:23,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:23,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:22:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:22:23,594 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:23,651 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-01-31 21:22:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:22:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:22:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:23,653 INFO L225 Difference]: With dead ends: 26 [2022-01-31 21:22:23,653 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:22:23,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:22:23,658 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:23,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:22:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:22:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 21:22:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 21:22:23,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-01-31 21:22:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:23,666 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 21:22:23,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 21:22:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 21:22:23,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:23,667 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:23,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:22:23,667 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-01-31 21:22:23,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627575913] [2022-01-31 21:22:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:23,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:23,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:23,807 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:23,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:23,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:23,949 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:23,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:24,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:24,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627575913] [2022-01-31 21:22:24,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627575913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:24,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:22:24,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650626848] [2022-01-31 21:22:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:24,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:22:24,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:22:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:22:24,183 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:24,321 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-31 21:22:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:22:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 21:22:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:24,322 INFO L225 Difference]: With dead ends: 39 [2022-01-31 21:22:24,322 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 21:22:24,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:22:24,323 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:24,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 21:22:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 21:22:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 21:22:24,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-01-31 21:22:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 21:22:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 21:22:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:22:24,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:24,329 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:24,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:22:24,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-01-31 21:22:24,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:24,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419789268] [2022-01-31 21:22:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:24,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:24,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:24,449 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:24,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:24,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:24,560 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:24,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:24,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:24,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419789268] [2022-01-31 21:22:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [419789268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:24,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:22:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946034259] [2022-01-31 21:22:24,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:24,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:22:24,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:22:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:22:24,773 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:24,905 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-31 21:22:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:22:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:22:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:24,908 INFO L225 Difference]: With dead ends: 42 [2022-01-31 21:22:24,908 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 21:22:24,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:22:24,909 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:24,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 21:22:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 21:22:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 21:22:24,913 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2022-01-31 21:22:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:24,913 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 21:22:24,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 21:22:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:22:24,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:24,913 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:24,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:22:24,914 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:24,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1246825262, now seen corresponding path program 3 times [2022-01-31 21:22:24,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:24,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225969688] [2022-01-31 21:22:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:24,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,008 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:25,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,101 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:25,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:25,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:25,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225969688] [2022-01-31 21:22:25,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225969688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:25,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:25,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:22:25,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931460446] [2022-01-31 21:22:25,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:25,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:22:25,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:22:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:22:25,333 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:25,484 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-01-31 21:22:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:22:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:22:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:25,485 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:22:25,485 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 21:22:25,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:22:25,486 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:25,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 21:22:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 21:22:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 21:22:25,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2022-01-31 21:22:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 21:22:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 21:22:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:22:25,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:25,491 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:25,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:22:25,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2108341683, now seen corresponding path program 4 times [2022-01-31 21:22:25,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:25,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725610950] [2022-01-31 21:22:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:25,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,570 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:25,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:25,680 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:25,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:25,820 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:25,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725610950] [2022-01-31 21:22:25,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1725610950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:25,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:25,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:22:25,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621199975] [2022-01-31 21:22:25,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:25,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:22:25,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:22:25,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:22:25,821 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:25,996 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-01-31 21:22:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:22:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:22:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:25,997 INFO L225 Difference]: With dead ends: 55 [2022-01-31 21:22:25,997 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 21:22:25,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:22:25,997 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:25,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 21:22:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-31 21:22:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 21:22:26,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2022-01-31 21:22:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:26,002 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 21:22:26,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 21:22:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 21:22:26,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:26,002 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:26,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:22:26,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1965893626, now seen corresponding path program 5 times [2022-01-31 21:22:26,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:26,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974103503] [2022-01-31 21:22:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:26,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,110 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:26,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,182 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:26,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:26,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974103503] [2022-01-31 21:22:26,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [974103503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:26,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:26,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:22:26,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379897965] [2022-01-31 21:22:26,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:26,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:22:26,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:22:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:22:26,442 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:26,713 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-31 21:22:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:22:26,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 21:22:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:26,714 INFO L225 Difference]: With dead ends: 72 [2022-01-31 21:22:26,714 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 21:22:26,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:22:26,715 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:26,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 21:22:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 21:22:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-01-31 21:22:26,721 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2022-01-31 21:22:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:26,721 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-01-31 21:22:26,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-01-31 21:22:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 21:22:26,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:26,722 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:22:26,722 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash 445199841, now seen corresponding path program 6 times [2022-01-31 21:22:26,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:26,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647468442] [2022-01-31 21:22:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:26,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,801 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:26,831 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:26,918 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:26,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:27,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:27,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647468442] [2022-01-31 21:22:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [647468442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:27,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:27,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:22:27,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396972571] [2022-01-31 21:22:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:27,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:22:27,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:22:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:22:27,182 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:27,444 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-01-31 21:22:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:22:27,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 21:22:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:27,445 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:22:27,445 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 21:22:27,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:22:27,446 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:27,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 75 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 21:22:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 21:22:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 21:22:27,458 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 33 [2022-01-31 21:22:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:27,458 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 21:22:27,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 21:22:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:22:27,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:27,459 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:27,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:22:27,459 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1776318212, now seen corresponding path program 7 times [2022-01-31 21:22:27,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185029340] [2022-01-31 21:22:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:27,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:27,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:27,547 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:27,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:27,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:27,626 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:27,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:27,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:27,892 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185029340] [2022-01-31 21:22:27,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [185029340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:27,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:27,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:22:27,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908429503] [2022-01-31 21:22:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:27,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:22:27,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:22:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:22:27,894 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:28,217 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-01-31 21:22:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:22:28,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 21:22:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:28,218 INFO L225 Difference]: With dead ends: 77 [2022-01-31 21:22:28,218 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 21:22:28,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:22:28,219 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:28,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 21:22:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-01-31 21:22:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-01-31 21:22:28,224 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 35 [2022-01-31 21:22:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:28,224 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-01-31 21:22:28,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-01-31 21:22:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:22:28,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:28,225 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:28,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:22:28,225 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 710995180, now seen corresponding path program 8 times [2022-01-31 21:22:28,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284240164] [2022-01-31 21:22:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:28,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:28,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:28,302 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:28,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:28,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:28,403 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:28,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:28,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:28,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284240164] [2022-01-31 21:22:28,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284240164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:28,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:28,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:22:28,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808955011] [2022-01-31 21:22:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:28,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:22:28,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:22:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:22:28,710 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:29,084 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-01-31 21:22:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:22:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:22:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:29,085 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:22:29,085 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 21:22:29,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:22:29,086 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:29,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 85 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 21:22:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 21:22:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 21:22:29,095 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 38 [2022-01-31 21:22:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:29,095 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 21:22:29,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 21:22:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:22:29,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:29,096 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:29,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:22:29,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1289310897, now seen corresponding path program 9 times [2022-01-31 21:22:29,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334519119] [2022-01-31 21:22:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:29,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:29,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:29,170 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:29,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:29,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:29,243 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:29,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:29,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:29,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334519119] [2022-01-31 21:22:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [334519119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:29,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:29,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:22:29,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635554928] [2022-01-31 21:22:29,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:29,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:22:29,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:22:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:22:29,604 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:29,961 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-01-31 21:22:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:22:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:22:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:29,962 INFO L225 Difference]: With dead ends: 82 [2022-01-31 21:22:29,962 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 21:22:29,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:22:29,963 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:29,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 21:22:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 21:22:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-01-31 21:22:29,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 40 [2022-01-31 21:22:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:29,968 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-01-31 21:22:29,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-01-31 21:22:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:22:29,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:29,969 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:29,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:22:29,969 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1295033546, now seen corresponding path program 10 times [2022-01-31 21:22:29,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:29,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562124674] [2022-01-31 21:22:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:30,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:30,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:30,042 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:30,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:30,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:30,131 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:30,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:30,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:30,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:30,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562124674] [2022-01-31 21:22:30,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [562124674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:30,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:30,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:22:30,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143376335] [2022-01-31 21:22:30,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:30,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:22:30,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:22:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:22:30,469 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:30,874 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-01-31 21:22:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:22:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:22:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:30,875 INFO L225 Difference]: With dead ends: 85 [2022-01-31 21:22:30,875 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 21:22:30,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:22:30,877 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:30,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 21:22:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 21:22:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-01-31 21:22:30,885 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 42 [2022-01-31 21:22:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:30,885 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-01-31 21:22:30,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-01-31 21:22:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 21:22:30,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:30,887 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:30,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:22:30,887 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:30,887 INFO L85 PathProgramCache]: Analyzing trace with hash -77349816, now seen corresponding path program 11 times [2022-01-31 21:22:30,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:30,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50553013] [2022-01-31 21:22:30,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:30,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:30,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:30,967 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:30,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:31,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:31,053 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:31,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:31,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50553013] [2022-01-31 21:22:31,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [50553013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:31,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:31,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:22:31,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260138603] [2022-01-31 21:22:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:31,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:22:31,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:22:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:22:31,434 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:31,945 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-01-31 21:22:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:22:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 21:22:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:31,946 INFO L225 Difference]: With dead ends: 88 [2022-01-31 21:22:31,946 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:22:31,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:22:31,947 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:31,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 100 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:22:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:22:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 21:22:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-01-31 21:22:31,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 45 [2022-01-31 21:22:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:31,952 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-01-31 21:22:31,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-01-31 21:22:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:22:31,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:31,953 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:31,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:22:31,953 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1759985379, now seen corresponding path program 12 times [2022-01-31 21:22:31,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:31,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776863733] [2022-01-31 21:22:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:32,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:32,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:32,048 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:32,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:32,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:32,113 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:32,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:32,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:32,529 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776863733] [2022-01-31 21:22:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776863733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:32,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:32,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:22:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157441199] [2022-01-31 21:22:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:32,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:22:32,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:22:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:22:32,530 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:33,106 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-01-31 21:22:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:22:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:22:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:33,106 INFO L225 Difference]: With dead ends: 90 [2022-01-31 21:22:33,107 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:22:33,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:22:33,107 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:33,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:22:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:22:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 21:22:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 21:22:33,112 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 47 [2022-01-31 21:22:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:33,112 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 21:22:33,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 21:22:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:22:33,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:33,113 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:33,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:22:33,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2087418178, now seen corresponding path program 13 times [2022-01-31 21:22:33,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460293967] [2022-01-31 21:22:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:33,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:33,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:33,202 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:33,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:33,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:33,291 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:33,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:33,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:33,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460293967] [2022-01-31 21:22:33,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460293967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:33,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:33,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:22:33,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823898319] [2022-01-31 21:22:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:22:33,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:22:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:22:33,702 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:34,242 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-01-31 21:22:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:22:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:22:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:34,250 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:22:34,250 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 21:22:34,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:22:34,251 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:34,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:22:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 21:22:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-31 21:22:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-31 21:22:34,263 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 49 [2022-01-31 21:22:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:34,263 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-31 21:22:34,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-31 21:22:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 21:22:34,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:34,263 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:34,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:22:34,264 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1475394599, now seen corresponding path program 14 times [2022-01-31 21:22:34,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:34,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001258034] [2022-01-31 21:22:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:34,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:34,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:34,334 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:34,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:34,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:34,416 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:34,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:34,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001258034] [2022-01-31 21:22:34,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001258034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:34,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:34,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:22:34,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875505359] [2022-01-31 21:22:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:34,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:22:34,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:22:34,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:22:34,768 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:35,341 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2022-01-31 21:22:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:22:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 21:22:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:35,342 INFO L225 Difference]: With dead ends: 115 [2022-01-31 21:22:35,342 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 21:22:35,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:22:35,343 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:35,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:22:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 21:22:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2022-01-31 21:22:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-01-31 21:22:35,348 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 51 [2022-01-31 21:22:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:35,348 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-01-31 21:22:35,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-01-31 21:22:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:22:35,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:35,349 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:35,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:22:35,349 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -856023180, now seen corresponding path program 15 times [2022-01-31 21:22:35,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580769170] [2022-01-31 21:22:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:35,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:35,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:35,424 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:35,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:35,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:35,486 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:35,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:35,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580769170] [2022-01-31 21:22:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580769170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:35,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:35,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:35,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016820986] [2022-01-31 21:22:35,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:35,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:22:35,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:22:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:22:35,895 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:36,583 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2022-01-31 21:22:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:22:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:22:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:36,584 INFO L225 Difference]: With dead ends: 111 [2022-01-31 21:22:36,584 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:22:36,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=2487, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:22:36,585 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:36,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 44 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:22:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:22:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 21:22:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-01-31 21:22:36,589 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2022-01-31 21:22:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:36,589 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-01-31 21:22:36,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-01-31 21:22:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:22:36,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:36,590 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:36,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:22:36,590 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -400630811, now seen corresponding path program 16 times [2022-01-31 21:22:36,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373811408] [2022-01-31 21:22:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:36,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:36,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:36,670 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:36,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:36,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:36,741 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:36,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:37,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:37,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373811408] [2022-01-31 21:22:37,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [373811408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:37,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:37,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:22:37,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119616035] [2022-01-31 21:22:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:37,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:22:37,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:22:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:22:37,320 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:38,114 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2022-01-31 21:22:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:22:38,114 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:22:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:38,114 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:22:38,114 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:22:38,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:22:38,116 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:38,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 125 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:22:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:22:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 21:22:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-01-31 21:22:38,122 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 61 [2022-01-31 21:22:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:38,122 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-01-31 21:22:38,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-01-31 21:22:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:22:38,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:38,123 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:38,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:22:38,123 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 154650752, now seen corresponding path program 17 times [2022-01-31 21:22:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206162166] [2022-01-31 21:22:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:38,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:38,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:38,192 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:38,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:38,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:38,265 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:38,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:38,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:38,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:38,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206162166] [2022-01-31 21:22:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [206162166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:38,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:38,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:22:38,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235725718] [2022-01-31 21:22:38,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:38,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:22:38,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:22:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:22:38,844 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:39,704 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-01-31 21:22:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:22:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:22:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:39,705 INFO L225 Difference]: With dead ends: 160 [2022-01-31 21:22:39,705 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 21:22:39,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=3292, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:22:39,706 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:39,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 135 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:22:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 21:22:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-31 21:22:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-01-31 21:22:39,713 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 63 [2022-01-31 21:22:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:39,713 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-01-31 21:22:39,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-01-31 21:22:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:22:39,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:39,714 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:39,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:22:39,714 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1204288091, now seen corresponding path program 18 times [2022-01-31 21:22:39,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:39,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643411431] [2022-01-31 21:22:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:39,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:39,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:39,814 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:39,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:39,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:39,881 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:39,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:39,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:40,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643411431] [2022-01-31 21:22:40,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [643411431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:40,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:40,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:22:40,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986553929] [2022-01-31 21:22:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:40,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:22:40,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:22:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:22:40,479 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:41,389 INFO L93 Difference]: Finished difference Result 162 states and 171 transitions. [2022-01-31 21:22:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:22:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:22:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:41,393 INFO L225 Difference]: With dead ends: 162 [2022-01-31 21:22:41,394 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 21:22:41,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:22:41,395 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:41,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 145 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:22:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 21:22:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-01-31 21:22:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-01-31 21:22:41,404 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 65 [2022-01-31 21:22:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:41,405 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-01-31 21:22:41,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-01-31 21:22:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:22:41,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:41,405 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:22:41,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 588456310, now seen corresponding path program 19 times [2022-01-31 21:22:41,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:41,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064330431] [2022-01-31 21:22:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:41,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:41,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:41,488 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:41,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:41,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:41,569 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:41,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:41,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:42,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064330431] [2022-01-31 21:22:42,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064330431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:42,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:42,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:22:42,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073386525] [2022-01-31 21:22:42,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:42,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:22:42,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:22:42,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:22:42,280 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:43,220 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2022-01-31 21:22:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:22:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:22:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:43,224 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:22:43,224 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:22:43,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=3768, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:22:43,227 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:43,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 140 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:22:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:22:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-01-31 21:22:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-01-31 21:22:43,233 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 67 [2022-01-31 21:22:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:43,234 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-01-31 21:22:43,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-01-31 21:22:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:22:43,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:43,234 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:43,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:22:43,234 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1479601617, now seen corresponding path program 20 times [2022-01-31 21:22:43,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755809939] [2022-01-31 21:22:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:43,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:43,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:43,301 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:43,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:43,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:43,385 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:43,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:43,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755809939] [2022-01-31 21:22:43,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755809939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:43,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:43,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:22:43,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614951740] [2022-01-31 21:22:43,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:22:43,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:22:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:22:43,942 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:44,950 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2022-01-31 21:22:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:22:44,951 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:22:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:44,951 INFO L225 Difference]: With dead ends: 177 [2022-01-31 21:22:44,951 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 21:22:44,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=3980, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:22:44,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:44,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 24 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:22:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 21:22:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 75. [2022-01-31 21:22:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-01-31 21:22:44,957 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 69 [2022-01-31 21:22:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:44,958 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-01-31 21:22:44,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-01-31 21:22:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:22:44,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:44,958 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:44,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:22:44,958 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:44,959 INFO L85 PathProgramCache]: Analyzing trace with hash 329111036, now seen corresponding path program 21 times [2022-01-31 21:22:44,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:44,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970995719] [2022-01-31 21:22:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:45,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:45,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:45,034 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:45,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:45,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:45,125 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:45,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:45,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:45,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:45,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970995719] [2022-01-31 21:22:45,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [970995719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:45,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:45,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 21:22:45,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720724928] [2022-01-31 21:22:45,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:45,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:22:45,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:22:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1389, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:22:45,790 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:47,022 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2022-01-31 21:22:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:22:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:22:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:47,023 INFO L225 Difference]: With dead ends: 197 [2022-01-31 21:22:47,023 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 21:22:47,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1166, Invalid=5154, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:22:47,024 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:47,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 95 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:22:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 21:22:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-01-31 21:22:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-01-31 21:22:47,033 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 74 [2022-01-31 21:22:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-01-31 21:22:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-01-31 21:22:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:22:47,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:47,033 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:47,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:22:47,033 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1730178626, now seen corresponding path program 22 times [2022-01-31 21:22:47,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:47,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095156613] [2022-01-31 21:22:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:47,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:47,102 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:47,103 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:47,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:47,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:47,181 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:47,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:47,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:47,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095156613] [2022-01-31 21:22:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095156613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 21:22:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162713771] [2022-01-31 21:22:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:47,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 21:22:47,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 21:22:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:22:47,996 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:49,224 INFO L93 Difference]: Finished difference Result 200 states and 209 transitions. [2022-01-31 21:22:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:22:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:49,225 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:22:49,225 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 21:22:49,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=317, Invalid=5085, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:22:49,227 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:49,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 170 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:22:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 21:22:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-01-31 21:22:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-01-31 21:22:49,235 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 77 [2022-01-31 21:22:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:49,235 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-01-31 21:22:49,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-01-31 21:22:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:22:49,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:49,235 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:49,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:22:49,236 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -944061219, now seen corresponding path program 23 times [2022-01-31 21:22:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:49,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035854244] [2022-01-31 21:22:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:49,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:49,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:49,303 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:49,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:49,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:49,368 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:49,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:50,059 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035854244] [2022-01-31 21:22:50,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035854244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:50,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:50,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:22:50,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61504838] [2022-01-31 21:22:50,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:50,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:22:50,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:22:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1349, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:22:50,060 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:51,404 INFO L93 Difference]: Finished difference Result 209 states and 225 transitions. [2022-01-31 21:22:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 21:22:51,404 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:22:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:51,405 INFO L225 Difference]: With dead ends: 209 [2022-01-31 21:22:51,405 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 21:22:51,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1365, Invalid=5441, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:22:51,406 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:51,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 39 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:22:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 21:22:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2022-01-31 21:22:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-01-31 21:22:51,412 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2022-01-31 21:22:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:51,412 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-01-31 21:22:51,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-01-31 21:22:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 21:22:51,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:51,413 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:51,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:22:51,413 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1289024528, now seen corresponding path program 24 times [2022-01-31 21:22:51,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:51,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747998844] [2022-01-31 21:22:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:51,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:51,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:51,503 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:51,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:51,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:51,578 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:51,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:51,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:52,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747998844] [2022-01-31 21:22:52,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747998844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:52,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:52,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 21:22:52,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27523632] [2022-01-31 21:22:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:52,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 21:22:52,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 21:22:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=1543, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:22:52,311 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:53,746 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2022-01-31 21:22:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:22:53,747 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 21:22:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:53,747 INFO L225 Difference]: With dead ends: 167 [2022-01-31 21:22:53,747 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 21:22:53,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1575, Invalid=6257, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:22:53,748 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:53,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 54 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:22:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 21:22:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-01-31 21:22:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-01-31 21:22:53,755 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2022-01-31 21:22:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:53,755 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-01-31 21:22:53,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-01-31 21:22:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:22:53,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:53,755 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:53,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:22:53,756 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2142809623, now seen corresponding path program 25 times [2022-01-31 21:22:53,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:53,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992154666] [2022-01-31 21:22:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:53,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:53,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:53,824 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:53,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:53,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:53,895 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:53,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:54,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:54,919 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992154666] [2022-01-31 21:22:54,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992154666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:54,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:54,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:22:54,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896230989] [2022-01-31 21:22:54,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:54,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:22:54,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:22:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2444, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:22:54,920 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:56,625 INFO L93 Difference]: Finished difference Result 238 states and 248 transitions. [2022-01-31 21:22:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:22:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 21:22:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:56,627 INFO L225 Difference]: With dead ends: 238 [2022-01-31 21:22:56,627 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 21:22:56,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=382, Invalid=6928, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:22:56,628 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:56,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 210 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:22:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 21:22:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-01-31 21:22:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-01-31 21:22:56,639 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 89 [2022-01-31 21:22:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-01-31 21:22:56,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-01-31 21:22:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 21:22:56,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:56,639 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:56,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:22:56,640 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash 929404932, now seen corresponding path program 26 times [2022-01-31 21:22:56,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:56,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987089542] [2022-01-31 21:22:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:56,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:56,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:56,721 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:56,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:56,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:56,787 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:56,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:56,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:57,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987089542] [2022-01-31 21:22:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987089542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:57,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:57,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:22:57,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968260627] [2022-01-31 21:22:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:22:57,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:22:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:22:57,623 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:59,360 INFO L93 Difference]: Finished difference Result 245 states and 259 transitions. [2022-01-31 21:22:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:22:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 21:22:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:59,361 INFO L225 Difference]: With dead ends: 245 [2022-01-31 21:22:59,361 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 21:22:59,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1845, Invalid=7467, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:22:59,362 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:59,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 59 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:22:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 21:22:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 97. [2022-01-31 21:22:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-01-31 21:22:59,369 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2022-01-31 21:22:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:59,369 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-01-31 21:22:59,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-01-31 21:22:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 21:22:59,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:59,369 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:59,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:22:59,369 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 274480809, now seen corresponding path program 27 times [2022-01-31 21:22:59,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239816786] [2022-01-31 21:22:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:59,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:59,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:59,452 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:59,475 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:59,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:22:59,516 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:22:59,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:59,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:00,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239816786] [2022-01-31 21:23:00,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [239816786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:00,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:00,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:23:00,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038935839] [2022-01-31 21:23:00,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:00,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:23:00,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:23:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2849, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:23:00,695 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 52 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:02,706 INFO L93 Difference]: Finished difference Result 258 states and 268 transitions. [2022-01-31 21:23:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:23:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 52 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 21:23:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:02,728 INFO L225 Difference]: With dead ends: 258 [2022-01-31 21:23:02,728 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 21:23:02,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=420, Invalid=8136, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:23:02,729 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:02,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 3446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:23:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 21:23:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-01-31 21:23:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 164 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-01-31 21:23:02,741 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 96 [2022-01-31 21:23:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:02,741 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-01-31 21:23:02,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 52 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-01-31 21:23:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 21:23:02,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:02,742 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:02,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:23:02,742 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1115878446, now seen corresponding path program 28 times [2022-01-31 21:23:02,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:02,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880548187] [2022-01-31 21:23:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:02,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:02,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:02,944 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:02,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:03,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:03,015 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:03,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:04,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:04,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880548187] [2022-01-31 21:23:04,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880548187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:04,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:04,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:23:04,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698963048] [2022-01-31 21:23:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:04,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:23:04,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:23:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2958, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:23:04,183 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:06,201 INFO L93 Difference]: Finished difference Result 260 states and 269 transitions. [2022-01-31 21:23:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:23:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 21:23:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:06,202 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:23:06,202 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 21:23:06,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=428, Invalid=8502, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:23:06,204 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:06,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 220 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:23:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 21:23:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-01-31 21:23:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-01-31 21:23:06,215 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 98 [2022-01-31 21:23:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:06,216 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-01-31 21:23:06,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-01-31 21:23:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 21:23:06,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:06,216 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:06,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:23:06,216 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2049811341, now seen corresponding path program 29 times [2022-01-31 21:23:06,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095814551] [2022-01-31 21:23:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:06,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:06,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:06,294 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:06,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:06,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:06,373 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:06,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:06,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:07,416 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:07,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095814551] [2022-01-31 21:23:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095814551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:07,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:07,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:23:07,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767723091] [2022-01-31 21:23:07,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:07,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:23:07,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:23:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:23:07,417 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:09,492 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2022-01-31 21:23:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 21:23:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 21:23:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:09,504 INFO L225 Difference]: With dead ends: 263 [2022-01-31 21:23:09,504 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 21:23:09,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2177, Invalid=9813, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 21:23:09,505 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 209 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3153 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 3153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:09,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 35 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 3153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:23:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 21:23:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-01-31 21:23:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-01-31 21:23:09,519 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 100 [2022-01-31 21:23:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:09,519 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-01-31 21:23:09,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-01-31 21:23:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 21:23:09,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:09,519 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:09,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:23:09,520 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:09,520 INFO L85 PathProgramCache]: Analyzing trace with hash 743336683, now seen corresponding path program 30 times [2022-01-31 21:23:09,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:09,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597008725] [2022-01-31 21:23:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:09,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:09,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:09,598 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:09,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:09,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:09,675 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:09,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:10,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597008725] [2022-01-31 21:23:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597008725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:10,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:10,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:23:10,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6267697] [2022-01-31 21:23:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:10,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:23:10,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:23:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=2658, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:23:10,768 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:12,953 INFO L93 Difference]: Finished difference Result 267 states and 277 transitions. [2022-01-31 21:23:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:23:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 21:23:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:12,954 INFO L225 Difference]: With dead ends: 267 [2022-01-31 21:23:12,954 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 21:23:12,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2483, Invalid=10399, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 21:23:12,955 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3313 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:12,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 64 Invalid, 3414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:23:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 21:23:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-01-31 21:23:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-01-31 21:23:12,967 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 103 [2022-01-31 21:23:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:12,967 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-01-31 21:23:12,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-01-31 21:23:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 21:23:12,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:12,967 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:12,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:23:12,968 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:12,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1976342109, now seen corresponding path program 31 times [2022-01-31 21:23:12,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:12,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329237038] [2022-01-31 21:23:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:13,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:13,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:13,071 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:13,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:13,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:13,136 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:13,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:13,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:14,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329237038] [2022-01-31 21:23:14,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [329237038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:14,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:14,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:23:14,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790165024] [2022-01-31 21:23:14,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:14,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:23:14,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:23:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:23:14,497 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 58 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:16,795 INFO L93 Difference]: Finished difference Result 270 states and 279 transitions. [2022-01-31 21:23:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:23:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 58 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 21:23:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:16,804 INFO L225 Difference]: With dead ends: 270 [2022-01-31 21:23:16,804 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 21:23:16,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=483, Invalid=10023, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:23:16,806 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3917 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 3963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:16,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 230 Invalid, 3963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3917 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:23:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 21:23:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-01-31 21:23:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-01-31 21:23:16,824 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 106 [2022-01-31 21:23:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:16,825 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-01-31 21:23:16,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 58 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-01-31 21:23:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 21:23:16,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:16,825 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:16,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:23:16,826 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1113200222, now seen corresponding path program 32 times [2022-01-31 21:23:16,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222620487] [2022-01-31 21:23:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:16,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:16,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:16,913 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:16,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:17,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:17,012 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:17,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:17,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:18,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222620487] [2022-01-31 21:23:18,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222620487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:18,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:18,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:23:18,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986683403] [2022-01-31 21:23:18,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:18,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:23:18,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:23:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=2647, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:23:18,172 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:20,536 INFO L93 Difference]: Finished difference Result 285 states and 307 transitions. [2022-01-31 21:23:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:23:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 21:23:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:20,547 INFO L225 Difference]: With dead ends: 285 [2022-01-31 21:23:20,547 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:23:20,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2673, Invalid=10899, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:23:20,549 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3528 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:20,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 29 Invalid, 3776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3528 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:23:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:23:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 114. [2022-01-31 21:23:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-01-31 21:23:20,559 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 108 [2022-01-31 21:23:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:20,559 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-01-31 21:23:20,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-01-31 21:23:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 21:23:20,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:20,560 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:20,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:23:20,560 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -329799561, now seen corresponding path program 33 times [2022-01-31 21:23:20,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392570858] [2022-01-31 21:23:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:20,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:20,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:20,634 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:20,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:20,713 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:20,713 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:20,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:20,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:22,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392570858] [2022-01-31 21:23:22,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [392570858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:22,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:22,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:23:22,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430563596] [2022-01-31 21:23:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:22,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:23:22,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:23:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:23:22,045 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:24,713 INFO L93 Difference]: Finished difference Result 307 states and 318 transitions. [2022-01-31 21:23:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:23:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 21:23:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:24,714 INFO L225 Difference]: With dead ends: 307 [2022-01-31 21:23:24,714 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 21:23:24,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2966, Invalid=12784, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 21:23:24,716 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 145 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3907 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:24,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 4066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3907 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:23:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 21:23:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-31 21:23:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-01-31 21:23:24,733 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 113 [2022-01-31 21:23:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:24,734 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-01-31 21:23:24,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-01-31 21:23:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 21:23:24,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:24,734 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:24,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:23:24,734 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:24,735 INFO L85 PathProgramCache]: Analyzing trace with hash 637790225, now seen corresponding path program 34 times [2022-01-31 21:23:24,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:24,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805220908] [2022-01-31 21:23:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:24,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:24,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:24,813 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:24,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:24,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:24,915 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:24,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:25,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:26,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805220908] [2022-01-31 21:23:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805220908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:26,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:26,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:23:26,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346834949] [2022-01-31 21:23:26,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:26,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:23:26,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:23:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=3392, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:23:26,197 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 65 states, 65 states have (on average 1.7230769230769232) internal successors, (112), 64 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:29,018 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2022-01-31 21:23:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 21:23:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7230769230769232) internal successors, (112), 64 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 21:23:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:29,024 INFO L225 Difference]: With dead ends: 311 [2022-01-31 21:23:29,026 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 21:23:29,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3307, Invalid=13463, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 21:23:29,028 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 240 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:29,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 49 Invalid, 4531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:23:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 21:23:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-01-31 21:23:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-01-31 21:23:29,044 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 116 [2022-01-31 21:23:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:29,044 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-01-31 21:23:29,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7230769230769232) internal successors, (112), 64 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-01-31 21:23:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 21:23:29,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:29,051 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:29,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:23:29,051 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash -828523251, now seen corresponding path program 35 times [2022-01-31 21:23:29,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:29,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397030444] [2022-01-31 21:23:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:29,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:29,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:29,142 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:29,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:29,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:29,234 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:29,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:29,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:30,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:30,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397030444] [2022-01-31 21:23:30,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397030444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:30,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:30,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:23:30,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86255671] [2022-01-31 21:23:30,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:30,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:23:30,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:30,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:23:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=4487, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:23:30,894 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:33,789 INFO L93 Difference]: Finished difference Result 314 states and 323 transitions. [2022-01-31 21:23:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 21:23:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 21:23:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:33,790 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:23:33,790 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:23:33,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=577, Invalid=12763, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 21:23:33,791 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 5000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:33,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 260 Invalid, 5000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:23:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:23:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-01-31 21:23:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-01-31 21:23:33,809 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 119 [2022-01-31 21:23:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:33,809 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-01-31 21:23:33,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-01-31 21:23:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 21:23:33,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:33,810 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:33,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:23:33,810 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1735745048, now seen corresponding path program 36 times [2022-01-31 21:23:33,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848697234] [2022-01-31 21:23:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:33,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:33,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:33,876 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:33,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:33,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:33,949 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:33,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:34,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:35,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:35,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848697234] [2022-01-31 21:23:35,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848697234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:35,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:35,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:23:35,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276722201] [2022-01-31 21:23:35,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:35,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:23:35,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:23:35,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:23:35,705 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 68 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 67 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:38,664 INFO L93 Difference]: Finished difference Result 316 states and 325 transitions. [2022-01-31 21:23:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:23:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 67 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 21:23:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:38,665 INFO L225 Difference]: With dead ends: 316 [2022-01-31 21:23:38,665 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 21:23:38,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=585, Invalid=13221, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 21:23:38,666 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:38,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 270 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:23:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 21:23:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 21:23:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2022-01-31 21:23:38,682 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 121 [2022-01-31 21:23:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:38,682 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2022-01-31 21:23:38,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 67 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2022-01-31 21:23:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 21:23:38,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:38,683 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:38,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:23:38,683 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1697530877, now seen corresponding path program 37 times [2022-01-31 21:23:38,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045899486] [2022-01-31 21:23:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:38,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:38,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:38,770 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:38,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:38,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:38,846 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:38,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:40,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:40,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045899486] [2022-01-31 21:23:40,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045899486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:40,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:40,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:23:40,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601935307] [2022-01-31 21:23:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:40,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:23:40,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:23:40,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:23:40,625 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:43,727 INFO L93 Difference]: Finished difference Result 318 states and 327 transitions. [2022-01-31 21:23:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:23:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 21:23:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:43,728 INFO L225 Difference]: With dead ends: 318 [2022-01-31 21:23:43,728 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 21:23:43,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=593, Invalid=13687, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 21:23:43,729 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5565 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:43,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 280 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 5565 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:23:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 21:23:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-01-31 21:23:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2022-01-31 21:23:43,746 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 123 [2022-01-31 21:23:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:43,746 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2022-01-31 21:23:43,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2022-01-31 21:23:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 21:23:43,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:43,747 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:43,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:23:43,747 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash 666549086, now seen corresponding path program 38 times [2022-01-31 21:23:43,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:43,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715605155] [2022-01-31 21:23:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:43,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:43,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:43,832 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:43,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:43,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:43,912 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:43,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:44,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:45,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715605155] [2022-01-31 21:23:45,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1715605155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:45,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:45,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:23:45,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085781753] [2022-01-31 21:23:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:45,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:23:45,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:23:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=3938, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:23:45,409 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 70 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 69 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:48,752 INFO L93 Difference]: Finished difference Result 321 states and 331 transitions. [2022-01-31 21:23:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:23:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 69 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 21:23:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:48,753 INFO L225 Difference]: With dead ends: 321 [2022-01-31 21:23:48,753 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 21:23:48,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3757, Invalid=15703, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 21:23:48,755 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 313 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5041 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 5041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:48,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 64 Invalid, 5369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 5041 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:23:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 21:23:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-01-31 21:23:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 208 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2022-01-31 21:23:48,772 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 125 [2022-01-31 21:23:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:48,773 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2022-01-31 21:23:48,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 69 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2022-01-31 21:23:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 21:23:48,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:48,773 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:48,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:23:48,773 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:48,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1343819126, now seen corresponding path program 39 times [2022-01-31 21:23:48,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:48,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376202217] [2022-01-31 21:23:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:48,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:48,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:48,853 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:48,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:48,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:48,915 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:48,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:49,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:50,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376202217] [2022-01-31 21:23:50,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376202217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:50,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:50,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 21:23:50,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241745867] [2022-01-31 21:23:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:50,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 21:23:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 21:23:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=5175, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:23:50,799 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 72 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 71 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:54,047 INFO L93 Difference]: Finished difference Result 324 states and 333 transitions. [2022-01-31 21:23:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 21:23:54,048 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 71 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 21:23:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:54,048 INFO L225 Difference]: With dead ends: 324 [2022-01-31 21:23:54,049 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 21:23:54,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=629, Invalid=14871, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 21:23:54,050 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5672 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 5727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:54,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 275 Invalid, 5727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5672 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:23:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 21:23:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-01-31 21:23:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 210 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 219 transitions. [2022-01-31 21:23:54,067 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 219 transitions. Word has length 128 [2022-01-31 21:23:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:54,067 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 219 transitions. [2022-01-31 21:23:54,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 71 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 219 transitions. [2022-01-31 21:23:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 21:23:54,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:54,068 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:54,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:23:54,068 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1290906609, now seen corresponding path program 40 times [2022-01-31 21:23:54,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:54,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519758727] [2022-01-31 21:23:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:54,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:54,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:54,139 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:54,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:54,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:54,201 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:54,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:54,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:56,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:56,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519758727] [2022-01-31 21:23:56,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519758727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:56,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:56,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:23:56,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705220257] [2022-01-31 21:23:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:56,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:23:56,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:23:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=5322, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:23:56,121 INFO L87 Difference]: Start difference. First operand 215 states and 219 transitions. Second operand has 73 states, 73 states have (on average 1.726027397260274) internal successors, (126), 72 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:59,518 INFO L93 Difference]: Finished difference Result 326 states and 335 transitions. [2022-01-31 21:23:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:23:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.726027397260274) internal successors, (126), 72 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 21:23:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:59,519 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:23:59,519 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 21:23:59,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=637, Invalid=15365, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:23:59,520 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5887 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:59,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 280 Invalid, 5943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5887 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:23:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 21:23:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-01-31 21:23:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2022-01-31 21:23:59,537 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 130 [2022-01-31 21:23:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:59,537 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2022-01-31 21:23:59,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.726027397260274) internal successors, (126), 72 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2022-01-31 21:23:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 21:23:59,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:59,538 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:59,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:23:59,538 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1981585324, now seen corresponding path program 41 times [2022-01-31 21:23:59,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:59,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9939151] [2022-01-31 21:23:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:59,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:59,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:59,612 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:59,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:59,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:23:59,675 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:23:59,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:59,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:01,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:01,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9939151] [2022-01-31 21:24:01,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [9939151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:01,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:01,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:24:01,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426050185] [2022-01-31 21:24:01,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:01,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:24:01,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:01,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:24:01,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4047, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:24:01,337 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand has 74 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 73 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:05,044 INFO L93 Difference]: Finished difference Result 347 states and 375 transitions. [2022-01-31 21:24:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:24:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 73 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-01-31 21:24:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:05,056 INFO L225 Difference]: With dead ends: 347 [2022-01-31 21:24:05,056 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 21:24:05,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5398 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4059, Invalid=16821, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 21:24:05,057 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 385 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:05,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 24 Invalid, 5784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:24:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 21:24:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 138. [2022-01-31 21:24:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-01-31 21:24:05,069 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 132 [2022-01-31 21:24:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-01-31 21:24:05,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 73 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-01-31 21:24:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 21:24:05,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:05,070 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:05,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:24:05,071 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1210089979, now seen corresponding path program 42 times [2022-01-31 21:24:05,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:05,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459033028] [2022-01-31 21:24:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:05,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:05,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:05,157 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:05,174 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:05,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:05,232 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:05,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:06,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459033028] [2022-01-31 21:24:06,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [459033028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:06,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:06,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:24:06,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84640909] [2022-01-31 21:24:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:06,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:24:06,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:24:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=4378, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:24:06,940 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 77 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:10,690 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2022-01-31 21:24:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:24:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 21:24:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:10,691 INFO L225 Difference]: With dead ends: 273 [2022-01-31 21:24:10,691 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 21:24:10,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5889 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4416, Invalid=18234, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:24:10,693 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 5838 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:10,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 54 Invalid, 6089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5838 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:24:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 21:24:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 21:24:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-01-31 21:24:10,708 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 137 [2022-01-31 21:24:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:10,708 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-01-31 21:24:10,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-01-31 21:24:10,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 21:24:10,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:10,708 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:10,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:24:10,709 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash -682506424, now seen corresponding path program 43 times [2022-01-31 21:24:10,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047490236] [2022-01-31 21:24:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:10,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:10,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:10,783 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:10,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:10,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:10,854 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:10,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:13,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:13,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047490236] [2022-01-31 21:24:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047490236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:13,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:24:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881349434] [2022-01-31 21:24:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:24:13,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:24:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=6370, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:24:13,115 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 80 states, 80 states have (on average 1.725) internal successors, (138), 79 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:17,219 INFO L93 Difference]: Finished difference Result 388 states and 398 transitions. [2022-01-31 21:24:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 21:24:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.725) internal successors, (138), 79 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 21:24:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:17,227 INFO L225 Difference]: With dead ends: 388 [2022-01-31 21:24:17,227 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 21:24:17,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=720, Invalid=18462, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:24:17,228 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 7385 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 7385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:17,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 320 Invalid, 7447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 7385 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:24:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 21:24:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-01-31 21:24:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0201612903225807) internal successors, (253), 248 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 257 transitions. [2022-01-31 21:24:17,253 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 257 transitions. Word has length 142 [2022-01-31 21:24:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:17,253 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 257 transitions. [2022-01-31 21:24:17,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.725) internal successors, (138), 79 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 257 transitions. [2022-01-31 21:24:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 21:24:17,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:17,253 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:17,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:24:17,254 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1669751795, now seen corresponding path program 44 times [2022-01-31 21:24:17,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:17,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273529470] [2022-01-31 21:24:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:17,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:17,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:17,334 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:17,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:17,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:17,402 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:17,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:17,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:19,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273529470] [2022-01-31 21:24:19,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [273529470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:19,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:19,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 21:24:19,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585901323] [2022-01-31 21:24:19,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:19,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 21:24:19,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 21:24:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1679, Invalid=5293, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:24:19,385 INFO L87 Difference]: Start difference. First operand 253 states and 257 transitions. Second operand has 81 states, 81 states have (on average 1.728395061728395) internal successors, (140), 80 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:23,723 INFO L93 Difference]: Finished difference Result 391 states and 401 transitions. [2022-01-31 21:24:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:24:23,724 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.728395061728395) internal successors, (140), 80 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 21:24:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:23,725 INFO L225 Difference]: With dead ends: 391 [2022-01-31 21:24:23,725 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 21:24:23,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4867, Invalid=21215, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 21:24:23,726 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 475 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6635 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 6635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:23,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 29 Invalid, 7128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 6635 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:24:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 21:24:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 21:24:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0199203187250996) internal successors, (256), 251 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2022-01-31 21:24:23,750 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 144 [2022-01-31 21:24:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:23,750 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2022-01-31 21:24:23,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.728395061728395) internal successors, (140), 80 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2022-01-31 21:24:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 21:24:23,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:23,751 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:23,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:24:23,751 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:23,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash 722035217, now seen corresponding path program 45 times [2022-01-31 21:24:23,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:23,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398950274] [2022-01-31 21:24:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:23,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:23,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:23,816 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:23,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:23,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:23,928 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:23,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:25,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398950274] [2022-01-31 21:24:25,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398950274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:25,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:25,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:24:25,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65894842] [2022-01-31 21:24:25,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:25,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:24:25,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:24:25,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=5468, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:24:25,920 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 83 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 82 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:30,345 INFO L93 Difference]: Finished difference Result 395 states and 405 transitions. [2022-01-31 21:24:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 21:24:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 82 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 21:24:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:30,346 INFO L225 Difference]: With dead ends: 395 [2022-01-31 21:24:30,346 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 21:24:30,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7464 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5295, Invalid=22095, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 21:24:30,348 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6825 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 6825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:30,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 29 Invalid, 7031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 6825 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:24:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 21:24:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-01-31 21:24:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 263 transitions. [2022-01-31 21:24:30,378 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 263 transitions. Word has length 147 [2022-01-31 21:24:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:30,378 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 263 transitions. [2022-01-31 21:24:30,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 82 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 263 transitions. [2022-01-31 21:24:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 21:24:30,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:30,379 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:30,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:24:30,379 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1570402185, now seen corresponding path program 46 times [2022-01-31 21:24:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:30,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647415616] [2022-01-31 21:24:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:30,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:30,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:30,449 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:30,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:30,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:30,514 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:30,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:33,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:33,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647415616] [2022-01-31 21:24:33,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647415616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:33,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:33,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:24:33,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836746934] [2022-01-31 21:24:33,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:33,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:24:33,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:24:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=7164, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:24:33,067 INFO L87 Difference]: Start difference. First operand 259 states and 263 transitions. Second operand has 85 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 84 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:37,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:37,511 INFO L93 Difference]: Finished difference Result 398 states and 407 transitions. [2022-01-31 21:24:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:24:37,511 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 84 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 21:24:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:37,512 INFO L225 Difference]: With dead ends: 398 [2022-01-31 21:24:37,512 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 21:24:37,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=791, Invalid=20671, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:24:37,513 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 7874 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 7938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 7874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:37,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 325 Invalid, 7938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 7874 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:24:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 21:24:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-01-31 21:24:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01953125) internal successors, (261), 256 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2022-01-31 21:24:37,537 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 150 [2022-01-31 21:24:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:37,537 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2022-01-31 21:24:37,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 84 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2022-01-31 21:24:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 21:24:37,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:37,538 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:37,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:24:37,538 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash 354603068, now seen corresponding path program 47 times [2022-01-31 21:24:37,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:37,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763173758] [2022-01-31 21:24:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:37,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:37,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:37,602 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:37,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:37,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:37,686 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:37,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:39,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:39,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763173758] [2022-01-31 21:24:39,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763173758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:39,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:39,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:24:39,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680266334] [2022-01-31 21:24:39,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:39,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:24:39,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:24:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=5449, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:24:39,731 INFO L87 Difference]: Start difference. First operand 261 states and 265 transitions. Second operand has 86 states, 86 states have (on average 1.7209302325581395) internal successors, (148), 85 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:44,394 INFO L93 Difference]: Finished difference Result 411 states and 431 transitions. [2022-01-31 21:24:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 21:24:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.7209302325581395) internal successors, (148), 85 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 21:24:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:44,395 INFO L225 Difference]: With dead ends: 411 [2022-01-31 21:24:44,395 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 21:24:44,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5577, Invalid=22815, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 21:24:44,397 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7168 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 7168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:44,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 39 Invalid, 7391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 7168 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:24:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 21:24:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 158. [2022-01-31 21:24:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-01-31 21:24:44,412 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 152 [2022-01-31 21:24:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:44,412 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-01-31 21:24:44,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.7209302325581395) internal successors, (148), 85 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-01-31 21:24:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 21:24:44,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:44,412 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:44,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:24:44,413 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1934769181, now seen corresponding path program 48 times [2022-01-31 21:24:44,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679658620] [2022-01-31 21:24:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:44,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:44,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:44,488 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:44,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:44,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:44,568 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:44,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:44,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:46,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679658620] [2022-01-31 21:24:46,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679658620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:46,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:46,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 21:24:46,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411928037] [2022-01-31 21:24:46,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:46,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 21:24:46,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 21:24:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2055, Invalid=6317, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:24:46,787 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 89 states, 89 states have (on average 1.7191011235955056) internal successors, (153), 88 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:51,904 INFO L93 Difference]: Finished difference Result 431 states and 442 transitions. [2022-01-31 21:24:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 21:24:51,904 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.7191011235955056) internal successors, (153), 88 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 21:24:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:51,905 INFO L225 Difference]: With dead ends: 431 [2022-01-31 21:24:51,905 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 21:24:51,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8623 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5986, Invalid=25520, Unknown=0, NotChecked=0, Total=31506 [2022-01-31 21:24:51,907 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 388 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7805 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 8214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 7805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:51,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 40 Invalid, 8214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 7805 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 21:24:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 21:24:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-01-31 21:24:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2022-01-31 21:24:51,937 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 157 [2022-01-31 21:24:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2022-01-31 21:24:51,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.7191011235955056) internal successors, (153), 88 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2022-01-31 21:24:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 21:24:51,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:51,938 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:51,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:24:51,938 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:51,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1321940395, now seen corresponding path program 49 times [2022-01-31 21:24:51,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:51,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794750571] [2022-01-31 21:24:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:52,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:52,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:52,031 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:52,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:52,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:52,113 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:52,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:54,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:54,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794750571] [2022-01-31 21:24:54,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794750571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:54,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:54,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 21:24:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844536628] [2022-01-31 21:24:54,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:54,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 21:24:54,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 21:24:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2116, Invalid=6074, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:24:54,291 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 91 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 90 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:59,438 INFO L93 Difference]: Finished difference Result 439 states and 453 transitions. [2022-01-31 21:24:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 21:24:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 90 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-01-31 21:24:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:59,439 INFO L225 Difference]: With dead ends: 439 [2022-01-31 21:24:59,439 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 21:24:59,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8498 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6342, Invalid=25520, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:24:59,441 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 267 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7910 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 7910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:59,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 54 Invalid, 8270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 7910 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 21:24:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 21:24:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 166. [2022-01-31 21:24:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-01-31 21:24:59,458 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 160 [2022-01-31 21:24:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:59,459 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-01-31 21:24:59,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 90 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-01-31 21:24:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 21:24:59,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:59,459 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:59,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:24:59,459 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1578062194, now seen corresponding path program 50 times [2022-01-31 21:24:59,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:59,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042099879] [2022-01-31 21:24:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:59,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:59,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:59,542 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:59,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:59,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:24:59,611 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:24:59,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:02,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:02,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042099879] [2022-01-31 21:25:02,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042099879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:02,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:02,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 21:25:02,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877746067] [2022-01-31 21:25:02,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:02,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 21:25:02,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:02,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 21:25:02,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2386, Invalid=6926, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:25:02,137 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 94 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 93 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:07,677 INFO L93 Difference]: Finished difference Result 453 states and 464 transitions. [2022-01-31 21:25:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 21:25:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 93 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 21:25:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:07,679 INFO L225 Difference]: With dead ends: 453 [2022-01-31 21:25:07,679 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 21:25:07,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9699 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6905, Invalid=28251, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 21:25:07,680 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 343 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 8590 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 8958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 8590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:07,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 85 Invalid, 8958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 8590 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 21:25:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 21:25:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-01-31 21:25:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0172413793103448) internal successors, (295), 290 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 299 transitions. [2022-01-31 21:25:07,713 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 299 transitions. Word has length 165 [2022-01-31 21:25:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:07,714 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 299 transitions. [2022-01-31 21:25:07,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 93 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 299 transitions. [2022-01-31 21:25:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 21:25:07,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:07,714 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:07,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:25:07,714 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash -681935782, now seen corresponding path program 51 times [2022-01-31 21:25:07,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:07,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471629130] [2022-01-31 21:25:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:07,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:07,827 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:07,827 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:07,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:07,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:07,884 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:07,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:08,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:10,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471629130] [2022-01-31 21:25:10,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [471629130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:10,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:10,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 21:25:10,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924226817] [2022-01-31 21:25:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:10,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 21:25:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 21:25:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=9083, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:25:10,955 INFO L87 Difference]: Start difference. First operand 295 states and 299 transitions. Second operand has 96 states, 96 states have (on average 1.7083333333333333) internal successors, (164), 95 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:16,635 INFO L93 Difference]: Finished difference Result 456 states and 465 transitions. [2022-01-31 21:25:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:25:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.7083333333333333) internal successors, (164), 95 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-01-31 21:25:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:16,636 INFO L225 Difference]: With dead ends: 456 [2022-01-31 21:25:16,636 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 21:25:16,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=953, Invalid=26107, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:25:16,638 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10152 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 10223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 10152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:16,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 375 Invalid, 10223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 10152 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:25:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 21:25:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-01-31 21:25:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0171232876712328) internal successors, (297), 292 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 301 transitions. [2022-01-31 21:25:16,671 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 301 transitions. Word has length 168 [2022-01-31 21:25:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:16,671 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 301 transitions. [2022-01-31 21:25:16,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.7083333333333333) internal successors, (164), 95 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 301 transitions. [2022-01-31 21:25:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 21:25:16,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:16,672 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:16,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:25:16,672 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash 654521567, now seen corresponding path program 52 times [2022-01-31 21:25:16,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:16,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145306521] [2022-01-31 21:25:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:16,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:16,743 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:16,743 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:16,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:16,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:16,820 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:16,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:17,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:19,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145306521] [2022-01-31 21:25:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145306521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:19,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:19,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 21:25:19,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972924998] [2022-01-31 21:25:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:19,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 21:25:19,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 21:25:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=9278, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:25:19,962 INFO L87 Difference]: Start difference. First operand 297 states and 301 transitions. Second operand has 97 states, 97 states have (on average 1.711340206185567) internal successors, (166), 96 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:25,697 INFO L93 Difference]: Finished difference Result 458 states and 467 transitions. [2022-01-31 21:25:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:25:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.711340206185567) internal successors, (166), 96 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 21:25:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:25,698 INFO L225 Difference]: With dead ends: 458 [2022-01-31 21:25:25,698 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 21:25:25,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=961, Invalid=26761, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 21:25:25,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 10157 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 10229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 10157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:25,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 370 Invalid, 10229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 10157 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:25:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 21:25:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-01-31 21:25:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0170068027210883) internal successors, (299), 294 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-01-31 21:25:25,739 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 170 [2022-01-31 21:25:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:25,739 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-01-31 21:25:25,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.711340206185567) internal successors, (166), 96 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-01-31 21:25:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 21:25:25,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:25,740 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:25,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:25:25,740 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash 794812452, now seen corresponding path program 53 times [2022-01-31 21:25:25,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:25,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035024102] [2022-01-31 21:25:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:25,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:25,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:25,799 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:25,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:25,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:25,862 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:25,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:26,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:28,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035024102] [2022-01-31 21:25:28,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035024102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:28,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:28,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 21:25:28,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671146378] [2022-01-31 21:25:28,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:28,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 21:25:28,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 21:25:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2447, Invalid=7059, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:25:28,367 INFO L87 Difference]: Start difference. First operand 299 states and 303 transitions. Second operand has 98 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 97 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:34,483 INFO L93 Difference]: Finished difference Result 469 states and 487 transitions. [2022-01-31 21:25:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 21:25:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 97 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 21:25:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:34,484 INFO L225 Difference]: With dead ends: 469 [2022-01-31 21:25:34,484 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 21:25:34,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9914 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7335, Invalid=29721, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 21:25:34,487 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 357 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9187 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 9187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:34,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 39 Invalid, 9508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 9187 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 21:25:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 21:25:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 178. [2022-01-31 21:25:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-01-31 21:25:34,506 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 172 [2022-01-31 21:25:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:34,506 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-01-31 21:25:34,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 97 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-01-31 21:25:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 21:25:34,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:34,506 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:34,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:25:34,507 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash -363998667, now seen corresponding path program 54 times [2022-01-31 21:25:34,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:34,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951038947] [2022-01-31 21:25:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:34,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:34,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:34,588 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:34,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:34,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:34,669 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:34,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:37,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:37,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951038947] [2022-01-31 21:25:37,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951038947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:37,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:37,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 21:25:37,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949278191] [2022-01-31 21:25:37,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:37,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 21:25:37,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 21:25:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2606, Invalid=7494, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:25:37,379 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 100 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:43,719 INFO L93 Difference]: Finished difference Result 353 states and 364 transitions. [2022-01-31 21:25:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 21:25:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 100 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 21:25:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:43,720 INFO L225 Difference]: With dead ends: 353 [2022-01-31 21:25:43,720 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 21:25:43,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10573 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7812, Invalid=31590, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 21:25:43,723 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 367 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9781 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 9781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:43,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 54 Invalid, 10180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 9781 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:25:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 21:25:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-01-31 21:25:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-01-31 21:25:43,745 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 177 [2022-01-31 21:25:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:43,745 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-01-31 21:25:43,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 100 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-01-31 21:25:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 21:25:43,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:43,746 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:43,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:25:43,746 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 619013912, now seen corresponding path program 55 times [2022-01-31 21:25:43,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023605829] [2022-01-31 21:25:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:43,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:43,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:43,806 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:43,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:43,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:43,866 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:43,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:47,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:47,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023605829] [2022-01-31 21:25:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023605829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:47,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:47,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 21:25:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757451953] [2022-01-31 21:25:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:47,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 21:25:47,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 21:25:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=10646, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:25:47,484 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 104 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 103 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:53,954 INFO L93 Difference]: Finished difference Result 500 states and 510 transitions. [2022-01-31 21:25:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:25:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 103 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 21:25:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:53,956 INFO L225 Difference]: With dead ends: 500 [2022-01-31 21:25:53,956 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 21:25:53,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5185 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1060, Invalid=30802, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:25:53,957 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 11173 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 11251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 11173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:53,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 380 Invalid, 11251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 11173 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 21:25:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 21:25:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-01-31 21:25:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.015625) internal successors, (325), 320 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 329 transitions. [2022-01-31 21:25:53,995 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 329 transitions. Word has length 182 [2022-01-31 21:25:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:53,995 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 329 transitions. [2022-01-31 21:25:53,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 103 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 329 transitions. [2022-01-31 21:25:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 21:25:53,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:53,996 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:53,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:25:53,996 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1374311133, now seen corresponding path program 56 times [2022-01-31 21:25:53,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:53,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181891620] [2022-01-31 21:25:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:54,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:54,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:54,065 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:54,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:54,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:25:54,136 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:25:54,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:54,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:57,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:57,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181891620] [2022-01-31 21:25:57,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181891620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:57,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:57,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 21:25:57,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576202594] [2022-01-31 21:25:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:57,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 21:25:57,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 21:25:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=10857, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:25:57,868 INFO L87 Difference]: Start difference. First operand 325 states and 329 transitions. Second operand has 105 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 104 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:04,881 INFO L93 Difference]: Finished difference Result 502 states and 511 transitions. [2022-01-31 21:26:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 21:26:04,882 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 104 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-01-31 21:26:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:04,883 INFO L225 Difference]: With dead ends: 502 [2022-01-31 21:26:04,883 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 21:26:04,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5292 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1068, Invalid=31512, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 21:26:04,886 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12249 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 12327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 12249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:04,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 410 Invalid, 12327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 12249 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 21:26:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 21:26:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-01-31 21:26:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.015527950310559) internal successors, (327), 322 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 331 transitions. [2022-01-31 21:26:04,926 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 331 transitions. Word has length 184 [2022-01-31 21:26:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:04,926 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 331 transitions. [2022-01-31 21:26:04,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 104 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 331 transitions. [2022-01-31 21:26:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 21:26:04,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:04,934 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:04,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:26:04,935 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1365467490, now seen corresponding path program 57 times [2022-01-31 21:26:04,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:04,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593186709] [2022-01-31 21:26:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:05,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:05,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:05,037 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:05,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:05,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:05,127 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:05,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:05,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:08,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593186709] [2022-01-31 21:26:08,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [593186709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:08,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:08,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 21:26:08,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921718960] [2022-01-31 21:26:08,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:08,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 21:26:08,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 21:26:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=11070, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:26:08,857 INFO L87 Difference]: Start difference. First operand 327 states and 331 transitions. Second operand has 106 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 105 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:15,741 INFO L93 Difference]: Finished difference Result 504 states and 513 transitions. [2022-01-31 21:26:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:26:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 105 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 21:26:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:15,742 INFO L225 Difference]: With dead ends: 504 [2022-01-31 21:26:15,742 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 21:26:15,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5400 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1076, Invalid=32230, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 21:26:15,744 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 12246 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 12325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 12246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:15,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 405 Invalid, 12325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 12246 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 21:26:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 21:26:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-01-31 21:26:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0154320987654322) internal successors, (329), 324 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 333 transitions. [2022-01-31 21:26:15,784 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 333 transitions. Word has length 186 [2022-01-31 21:26:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:15,784 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 333 transitions. [2022-01-31 21:26:15,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 105 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 333 transitions. [2022-01-31 21:26:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 21:26:15,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:15,785 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:15,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:26:15,785 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1456661159, now seen corresponding path program 58 times [2022-01-31 21:26:15,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:15,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607524494] [2022-01-31 21:26:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:15,835 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:15,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:15,860 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:15,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:15,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:15,920 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:15,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:19,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:19,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607524494] [2022-01-31 21:26:19,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [607524494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:19,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:19,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 21:26:19,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456154221] [2022-01-31 21:26:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 21:26:19,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 21:26:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=11285, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 21:26:19,717 INFO L87 Difference]: Start difference. First operand 329 states and 333 transitions. Second operand has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 106 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:26,812 INFO L93 Difference]: Finished difference Result 506 states and 515 transitions. [2022-01-31 21:26:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:26:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 106 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-01-31 21:26:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:26,813 INFO L225 Difference]: With dead ends: 506 [2022-01-31 21:26:26,813 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 21:26:26,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1084, Invalid=32956, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 21:26:26,817 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12565 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 12645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 12565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:26,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 410 Invalid, 12645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 12565 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 21:26:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 21:26:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-01-31 21:26:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0153374233128833) internal successors, (331), 326 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 335 transitions. [2022-01-31 21:26:26,854 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 335 transitions. Word has length 188 [2022-01-31 21:26:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:26,854 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 335 transitions. [2022-01-31 21:26:26,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 106 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 335 transitions. [2022-01-31 21:26:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 21:26:26,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:26,855 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:26,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:26:26,855 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1100536148, now seen corresponding path program 59 times [2022-01-31 21:26:26,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930255771] [2022-01-31 21:26:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:26,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:26,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:26,924 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:26,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:26,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:26,996 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:27,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:27,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:30,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930255771] [2022-01-31 21:26:30,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930255771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:30,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:30,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 21:26:30,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951668188] [2022-01-31 21:26:30,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:30,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 21:26:30,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 21:26:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=11502, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:26:30,825 INFO L87 Difference]: Start difference. First operand 331 states and 335 transitions. Second operand has 108 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 107 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:38,002 INFO L93 Difference]: Finished difference Result 508 states and 517 transitions. [2022-01-31 21:26:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:26:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 107 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 21:26:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:38,004 INFO L225 Difference]: With dead ends: 508 [2022-01-31 21:26:38,004 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 21:26:38,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5619 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1092, Invalid=33690, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 21:26:38,005 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12401 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 12482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 12401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:38,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 400 Invalid, 12482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 12401 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 21:26:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 21:26:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-01-31 21:26:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.0152439024390243) internal successors, (333), 328 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 337 transitions. [2022-01-31 21:26:38,043 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 337 transitions. Word has length 190 [2022-01-31 21:26:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 337 transitions. [2022-01-31 21:26:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 107 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 337 transitions. [2022-01-31 21:26:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 21:26:38,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:38,044 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:38,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:26:38,044 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1845854863, now seen corresponding path program 60 times [2022-01-31 21:26:38,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:38,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365071863] [2022-01-31 21:26:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:38,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:38,104 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:38,104 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:38,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:38,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:38,183 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:38,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:38,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:41,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365071863] [2022-01-31 21:26:41,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365071863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:41,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:41,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 21:26:41,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209613941] [2022-01-31 21:26:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:41,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 21:26:41,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 21:26:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=8842, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:26:41,315 INFO L87 Difference]: Start difference. First operand 333 states and 337 transitions. Second operand has 109 states, 109 states have (on average 1.724770642201835) internal successors, (188), 108 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:48,935 INFO L93 Difference]: Finished difference Result 523 states and 545 transitions. [2022-01-31 21:26:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 21:26:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.724770642201835) internal successors, (188), 108 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-01-31 21:26:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:48,937 INFO L225 Difference]: With dead ends: 523 [2022-01-31 21:26:48,937 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 21:26:48,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12193 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=8784, Invalid=37226, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 21:26:48,939 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 480 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11815 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 12334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 11815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:48,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 49 Invalid, 12334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 11815 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 21:26:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 21:26:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 198. [2022-01-31 21:26:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2022-01-31 21:26:48,960 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 192 [2022-01-31 21:26:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:48,960 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2022-01-31 21:26:48,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.724770642201835) internal successors, (188), 108 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2022-01-31 21:26:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 21:26:48,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:48,961 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:48,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:26:48,961 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:48,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2007959432, now seen corresponding path program 61 times [2022-01-31 21:26:48,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:48,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665036289] [2022-01-31 21:26:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:49,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:49,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:49,033 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:49,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:49,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:26:49,091 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:26:49,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:53,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:53,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665036289] [2022-01-31 21:26:53,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1665036289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:53,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:53,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 21:26:53,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525232828] [2022-01-31 21:26:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:53,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 21:26:53,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 21:26:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=12362, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:26:53,308 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 112 states, 112 states have (on average 1.7232142857142858) internal successors, (193), 111 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:01,272 INFO L93 Difference]: Finished difference Result 544 states and 554 transitions. [2022-01-31 21:27:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 21:27:01,273 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.7232142857142858) internal successors, (193), 111 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 21:27:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:01,276 INFO L225 Difference]: With dead ends: 544 [2022-01-31 21:27:01,276 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 21:27:01,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1147, Invalid=36295, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 21:27:01,278 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 14533 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 14618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 14533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:01,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 450 Invalid, 14618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 14533 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 21:27:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 21:27:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-01-31 21:27:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 1.0143266475644699) internal successors, (354), 349 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 358 transitions. [2022-01-31 21:27:01,320 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 358 transitions. Word has length 197 [2022-01-31 21:27:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:01,320 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 358 transitions. [2022-01-31 21:27:01,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.7232142857142858) internal successors, (193), 111 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 358 transitions. [2022-01-31 21:27:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 21:27:01,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:01,321 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:01,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:27:01,321 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1642694365, now seen corresponding path program 62 times [2022-01-31 21:27:01,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:01,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893644231] [2022-01-31 21:27:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:01,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:01,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:01,385 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:01,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:01,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:01,456 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:01,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:04,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:04,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893644231] [2022-01-31 21:27:04,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893644231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:04,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:04,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 21:27:04,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576426200] [2022-01-31 21:27:04,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:04,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 21:27:04,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 21:27:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3204, Invalid=10136, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 21:27:04,954 INFO L87 Difference]: Start difference. First operand 354 states and 358 transitions. Second operand has 113 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 112 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:13,095 INFO L93 Difference]: Finished difference Result 547 states and 557 transitions. [2022-01-31 21:27:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 21:27:13,096 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 112 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 21:27:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:13,096 INFO L225 Difference]: With dead ends: 547 [2022-01-31 21:27:13,096 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 21:27:13,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13843 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9391, Invalid=41459, Unknown=0, NotChecked=0, Total=50850 [2022-01-31 21:27:13,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 417 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12724 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 13168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 12724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:13,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 50 Invalid, 13168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 12724 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 21:27:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 21:27:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2022-01-31 21:27:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.0142045454545454) internal successors, (357), 352 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 361 transitions. [2022-01-31 21:27:13,147 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 361 transitions. Word has length 199 [2022-01-31 21:27:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 361 transitions. [2022-01-31 21:27:13,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 112 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 361 transitions. [2022-01-31 21:27:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 21:27:13,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:13,148 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:13,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:27:13,148 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1186222885, now seen corresponding path program 63 times [2022-01-31 21:27:13,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:13,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310591654] [2022-01-31 21:27:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:13,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,259 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,259 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:13,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,348 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:13,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:13,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:16,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310591654] [2022-01-31 21:27:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [310591654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:16,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:16,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 21:27:16,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448723941] [2022-01-31 21:27:16,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:16,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 21:27:16,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 21:27:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=9827, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:27:16,836 INFO L87 Difference]: Start difference. First operand 357 states and 361 transitions. Second operand has 115 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 114 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:25,370 INFO L93 Difference]: Finished difference Result 557 states and 573 transitions. [2022-01-31 21:27:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 21:27:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 114 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 21:27:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:25,371 INFO L225 Difference]: With dead ends: 557 [2022-01-31 21:27:25,371 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 21:27:25,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13676 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=9843, Invalid=41459, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 21:27:25,374 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 421 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 13142 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 13142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:25,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 39 Invalid, 13682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 13142 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 21:27:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 21:27:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 208. [2022-01-31 21:27:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.019704433497537) internal successors, (207), 203 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-01-31 21:27:25,397 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 202 [2022-01-31 21:27:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:25,397 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-01-31 21:27:25,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 114 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-01-31 21:27:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 21:27:25,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:25,398 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:25,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:27:25,398 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2139190060, now seen corresponding path program 64 times [2022-01-31 21:27:25,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:25,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393670164] [2022-01-31 21:27:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:25,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,518 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,610 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:26,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:29,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393670164] [2022-01-31 21:27:29,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393670164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:29,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:29,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 21:27:29,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021502534] [2022-01-31 21:27:29,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:29,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 21:27:29,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:29,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 21:27:29,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3627, Invalid=10893, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 21:27:29,299 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 118 states, 118 states have (on average 1.7203389830508475) internal successors, (203), 117 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:38,179 INFO L93 Difference]: Finished difference Result 573 states and 584 transitions. [2022-01-31 21:27:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 21:27:38,180 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7203389830508475) internal successors, (203), 117 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 21:27:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:38,181 INFO L225 Difference]: With dead ends: 573 [2022-01-31 21:27:38,181 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 21:27:38,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15209 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=10560, Invalid=44900, Unknown=0, NotChecked=0, Total=55460 [2022-01-31 21:27:38,183 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13920 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 13920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:38,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 34 Invalid, 14212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 13920 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 21:27:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 21:27:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-01-31 21:27:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.013586956521739) internal successors, (373), 368 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 377 transitions. [2022-01-31 21:27:38,227 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 377 transitions. Word has length 207 [2022-01-31 21:27:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:38,227 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 377 transitions. [2022-01-31 21:27:38,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7203389830508475) internal successors, (203), 117 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 377 transitions. [2022-01-31 21:27:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 21:27:38,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:38,228 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:38,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:27:38,228 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1194877076, now seen corresponding path program 65 times [2022-01-31 21:27:38,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:38,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17916204] [2022-01-31 21:27:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:38,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:38,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:38,296 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:38,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:38,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:38,362 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:38,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:38,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:42,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17916204] [2022-01-31 21:27:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [17916204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:42,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 21:27:42,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207610655] [2022-01-31 21:27:42,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:42,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 21:27:42,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 21:27:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3620, Invalid=10660, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 21:27:42,027 INFO L87 Difference]: Start difference. First operand 373 states and 377 transitions. Second operand has 120 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 119 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:51,104 INFO L93 Difference]: Finished difference Result 581 states and 595 transitions. [2022-01-31 21:27:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 21:27:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 119 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 21:27:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:51,105 INFO L225 Difference]: With dead ends: 581 [2022-01-31 21:27:51,105 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 21:27:51,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15029 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=10854, Invalid=45078, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 21:27:51,108 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 436 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14078 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 14380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 14078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:51,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 64 Invalid, 14380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 14078 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 21:27:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 21:27:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 216. [2022-01-31 21:27:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-01-31 21:27:51,135 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 210 [2022-01-31 21:27:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:51,135 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-01-31 21:27:51,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 119 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-01-31 21:27:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 21:27:51,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:51,136 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:51,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:27:51,136 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1810376891, now seen corresponding path program 66 times [2022-01-31 21:27:51,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469297681] [2022-01-31 21:27:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:51,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:51,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:51,208 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:51,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:51,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:51,271 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:51,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:51,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:55,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469297681] [2022-01-31 21:27:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469297681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:55,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:55,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 21:27:55,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159172269] [2022-01-31 21:27:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:55,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 21:27:55,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 21:27:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3980, Invalid=11770, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 21:27:55,183 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 123 states, 123 states have (on average 1.7154471544715446) internal successors, (211), 122 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:05,107 INFO L93 Difference]: Finished difference Result 595 states and 606 transitions. [2022-01-31 21:28:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 21:28:05,108 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.7154471544715446) internal successors, (211), 122 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 21:28:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:05,109 INFO L225 Difference]: With dead ends: 595 [2022-01-31 21:28:05,109 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 21:28:05,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16628 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=11605, Invalid=48665, Unknown=0, NotChecked=0, Total=60270 [2022-01-31 21:28:05,111 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 623 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15165 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 15165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:05,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 34 Invalid, 15819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 15165 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-31 21:28:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 21:28:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-01-31 21:28:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 382 states have (on average 1.013089005235602) internal successors, (387), 382 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 391 transitions. [2022-01-31 21:28:05,161 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 391 transitions. Word has length 215 [2022-01-31 21:28:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:05,161 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 391 transitions. [2022-01-31 21:28:05,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.7154471544715446) internal successors, (211), 122 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 391 transitions. [2022-01-31 21:28:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 21:28:05,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:05,162 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:05,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:28:05,162 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash -103346365, now seen corresponding path program 67 times [2022-01-31 21:28:05,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:05,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831589220] [2022-01-31 21:28:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:05,204 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,230 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:05,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,295 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:05,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:05,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:09,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831589220] [2022-01-31 21:28:09,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831589220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:09,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:09,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 21:28:09,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627785572] [2022-01-31 21:28:09,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:09,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 21:28:09,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:09,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 21:28:09,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3973, Invalid=11527, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 21:28:09,389 INFO L87 Difference]: Start difference. First operand 387 states and 391 transitions. Second operand has 125 states, 125 states have (on average 1.712) internal successors, (214), 124 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:19,229 INFO L93 Difference]: Finished difference Result 603 states and 617 transitions. [2022-01-31 21:28:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 21:28:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.712) internal successors, (214), 124 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-01-31 21:28:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:19,230 INFO L225 Difference]: With dead ends: 603 [2022-01-31 21:28:19,230 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 21:28:19,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16443 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=11913, Invalid=48849, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 21:28:19,233 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 541 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15138 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 15808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 15138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:19,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 49 Invalid, 15808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 15138 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-01-31 21:28:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 21:28:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 224. [2022-01-31 21:28:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 219 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2022-01-31 21:28:19,262 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 218 [2022-01-31 21:28:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:19,262 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2022-01-31 21:28:19,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.712) internal successors, (214), 124 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2022-01-31 21:28:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 21:28:19,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:19,263 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:19,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:28:19,263 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash -543119242, now seen corresponding path program 68 times [2022-01-31 21:28:19,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:19,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724086124] [2022-01-31 21:28:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:19,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,354 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:19,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,425 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:19,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:20,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:23,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:23,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724086124] [2022-01-31 21:28:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [724086124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:23,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:23,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 21:28:23,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702751133] [2022-01-31 21:28:23,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:23,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 21:28:23,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 21:28:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4254, Invalid=12776, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:28:23,644 INFO L87 Difference]: Start difference. First operand 224 states and 227 transitions. Second operand has 128 states, 128 states have (on average 1.7109375) internal successors, (219), 127 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:33,916 INFO L93 Difference]: Finished difference Result 617 states and 628 transitions. [2022-01-31 21:28:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 21:28:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.7109375) internal successors, (219), 127 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 21:28:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:33,917 INFO L225 Difference]: With dead ends: 617 [2022-01-31 21:28:33,918 INFO L226 Difference]: Without dead ends: 401 [2022-01-31 21:28:33,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18100 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12508, Invalid=52772, Unknown=0, NotChecked=0, Total=65280 [2022-01-31 21:28:33,920 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 370 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15797 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 16200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 15797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:33,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 60 Invalid, 16200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 15797 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-01-31 21:28:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-31 21:28:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-01-31 21:28:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.0126262626262625) internal successors, (401), 396 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 405 transitions. [2022-01-31 21:28:33,985 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 405 transitions. Word has length 223 [2022-01-31 21:28:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:33,985 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 405 transitions. [2022-01-31 21:28:33,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.7109375) internal successors, (219), 127 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 405 transitions. [2022-01-31 21:28:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 21:28:33,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:33,986 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:33,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:28:33,986 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 983306034, now seen corresponding path program 69 times [2022-01-31 21:28:33,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:33,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697916995] [2022-01-31 21:28:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:34,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,053 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:34,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,170 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:34,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:39,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697916995] [2022-01-31 21:28:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697916995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:39,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:39,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 21:28:39,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112901053] [2022-01-31 21:28:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:39,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 21:28:39,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 21:28:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=16530, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 21:28:39,591 INFO L87 Difference]: Start difference. First operand 401 states and 405 transitions. Second operand has 130 states, 130 states have (on average 1.7076923076923076) internal successors, (222), 129 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:49,915 INFO L93 Difference]: Finished difference Result 620 states and 629 transitions. [2022-01-31 21:28:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 21:28:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.7076923076923076) internal successors, (222), 129 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 21:28:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:49,917 INFO L225 Difference]: With dead ends: 620 [2022-01-31 21:28:49,917 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 21:28:49,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8016 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1480, Invalid=48026, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 21:28:49,919 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 18144 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 18239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 18144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:49,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 495 Invalid, 18239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 18144 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 21:28:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 21:28:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2022-01-31 21:28:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 398 states have (on average 1.0125628140703518) internal successors, (403), 398 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 407 transitions. [2022-01-31 21:28:49,975 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 407 transitions. Word has length 226 [2022-01-31 21:28:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:49,975 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 407 transitions. [2022-01-31 21:28:49,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.7076923076923076) internal successors, (222), 129 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 407 transitions. [2022-01-31 21:28:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 21:28:49,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:49,976 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:49,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:28:49,976 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:49,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2115885193, now seen corresponding path program 70 times [2022-01-31 21:28:49,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:49,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611947728] [2022-01-31 21:28:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:50,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:50,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:50,036 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:50,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:50,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:50,094 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:50,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:50,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:54,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611947728] [2022-01-31 21:28:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [611947728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:54,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 21:28:54,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597963799] [2022-01-31 21:28:54,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:54,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 21:28:54,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 21:28:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4382, Invalid=12648, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:28:54,402 INFO L87 Difference]: Start difference. First operand 403 states and 407 transitions. Second operand has 131 states, 131 states have (on average 1.7099236641221374) internal successors, (224), 130 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:05,222 INFO L93 Difference]: Finished difference Result 629 states and 645 transitions. [2022-01-31 21:29:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 21:29:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.7099236641221374) internal successors, (224), 130 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2022-01-31 21:29:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:05,223 INFO L225 Difference]: With dead ends: 629 [2022-01-31 21:29:05,223 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 21:29:05,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18154 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13140, Invalid=53682, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 21:29:05,226 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 379 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 16556 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 16556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:05,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 74 Invalid, 17068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 16556 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-31 21:29:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 21:29:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 234. [2022-01-31 21:29:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.017467248908297) internal successors, (233), 229 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 237 transitions. [2022-01-31 21:29:05,259 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 237 transitions. Word has length 228 [2022-01-31 21:29:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:05,260 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 237 transitions. [2022-01-31 21:29:05,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.7099236641221374) internal successors, (224), 130 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 237 transitions. [2022-01-31 21:29:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 21:29:05,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:05,261 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:05,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:29:05,261 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1324704958, now seen corresponding path program 71 times [2022-01-31 21:29:05,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311002513] [2022-01-31 21:29:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:05,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:05,331 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:05,331 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:05,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:05,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:05,400 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:05,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:06,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:11,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311002513] [2022-01-31 21:29:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311002513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:11,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:11,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 21:29:11,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796736386] [2022-01-31 21:29:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:11,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 21:29:11,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 21:29:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=17558, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 21:29:11,146 INFO L87 Difference]: Start difference. First operand 234 states and 237 transitions. Second operand has 134 states, 134 states have (on average 1.708955223880597) internal successors, (229), 133 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:22,113 INFO L93 Difference]: Finished difference Result 644 states and 654 transitions. [2022-01-31 21:29:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 21:29:22,113 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.708955223880597) internal successors, (229), 133 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 21:29:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:22,114 INFO L225 Difference]: With dead ends: 644 [2022-01-31 21:29:22,114 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 21:29:22,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8515 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1543, Invalid=51127, Unknown=0, NotChecked=0, Total=52670 [2022-01-31 21:29:22,117 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 19110 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 19209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 19110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:22,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 505 Invalid, 19209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 19110 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 21:29:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 21:29:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-01-31 21:29:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.0121065375302662) internal successors, (418), 413 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 422 transitions. [2022-01-31 21:29:22,180 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 422 transitions. Word has length 233 [2022-01-31 21:29:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:22,180 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 422 transitions. [2022-01-31 21:29:22,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.708955223880597) internal successors, (229), 133 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 422 transitions. [2022-01-31 21:29:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 21:29:22,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:22,181 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:22,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:29:22,182 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -353723555, now seen corresponding path program 72 times [2022-01-31 21:29:22,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:22,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341257010] [2022-01-31 21:29:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:22,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:22,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:22,249 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:22,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:22,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:22,321 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:22,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:23,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:27,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:27,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341257010] [2022-01-31 21:29:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341257010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:27,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:27,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 21:29:27,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100333333] [2022-01-31 21:29:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:27,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 21:29:27,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 21:29:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4718, Invalid=14188, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 21:29:27,011 INFO L87 Difference]: Start difference. First operand 418 states and 422 transitions. Second operand has 135 states, 135 states have (on average 1.711111111111111) internal successors, (231), 134 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:38,596 INFO L93 Difference]: Finished difference Result 647 states and 657 transitions. [2022-01-31 21:29:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 21:29:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.711111111111111) internal successors, (231), 134 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 21:29:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:38,598 INFO L225 Difference]: With dead ends: 647 [2022-01-31 21:29:38,598 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 21:29:38,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20142 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13887, Invalid=58743, Unknown=0, NotChecked=0, Total=72630 [2022-01-31 21:29:38,600 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 295 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17671 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 17671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:38,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 25 Invalid, 18001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 17671 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 21:29:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 21:29:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-01-31 21:29:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 416 states have (on average 1.0120192307692308) internal successors, (421), 416 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 425 transitions. [2022-01-31 21:29:38,661 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 425 transitions. Word has length 235 [2022-01-31 21:29:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:38,661 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 425 transitions. [2022-01-31 21:29:38,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.711111111111111) internal successors, (231), 134 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 425 transitions. [2022-01-31 21:29:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 21:29:38,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:38,662 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:38,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:29:38,662 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1857247659, now seen corresponding path program 73 times [2022-01-31 21:29:38,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639829681] [2022-01-31 21:29:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:38,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:38,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:38,740 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:38,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:38,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:38,805 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:38,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:39,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:43,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639829681] [2022-01-31 21:29:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639829681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:43,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:43,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 21:29:43,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285027949] [2022-01-31 21:29:43,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:43,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 21:29:43,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 21:29:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4811, Invalid=13821, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 21:29:43,582 INFO L87 Difference]: Start difference. First operand 421 states and 425 transitions. Second operand has 137 states, 137 states have (on average 1.7080291970802919) internal successors, (234), 136 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:55,509 INFO L93 Difference]: Finished difference Result 657 states and 673 transitions. [2022-01-31 21:29:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 21:29:55,509 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.7080291970802919) internal successors, (234), 136 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-01-31 21:29:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:55,510 INFO L225 Difference]: With dead ends: 657 [2022-01-31 21:29:55,510 INFO L226 Difference]: Without dead ends: 430 [2022-01-31 21:29:55,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19949 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=14427, Invalid=58743, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 21:29:55,513 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 394 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17963 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 17963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:55,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 39 Invalid, 18497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 17963 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-31 21:29:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-31 21:29:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 244. [2022-01-31 21:29:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0167364016736402) internal successors, (243), 239 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2022-01-31 21:29:55,547 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 238 [2022-01-31 21:29:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:55,547 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2022-01-31 21:29:55,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.7080291970802919) internal successors, (234), 136 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2022-01-31 21:29:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 21:29:55,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:55,548 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:55,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:29:55,549 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1293292558, now seen corresponding path program 74 times [2022-01-31 21:29:55,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317147221] [2022-01-31 21:29:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:55,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:55,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:55,632 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:55,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:55,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:55,694 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:55,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:00,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317147221] [2022-01-31 21:30:00,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [317147221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:00,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:00,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 21:30:00,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338855837] [2022-01-31 21:30:00,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:00,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 21:30:00,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 21:30:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5033, Invalid=14427, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 21:30:00,626 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 140 states, 140 states have (on average 1.707142857142857) internal successors, (239), 139 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:13,212 INFO L93 Difference]: Finished difference Result 485 states and 496 transitions. [2022-01-31 21:30:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 21:30:13,212 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.707142857142857) internal successors, (239), 139 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 21:30:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:13,213 INFO L225 Difference]: With dead ends: 485 [2022-01-31 21:30:13,213 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 21:30:13,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20917 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=15093, Invalid=61359, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 21:30:13,216 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 403 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 18784 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 19229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 18784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:13,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 49 Invalid, 19229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 18784 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-31 21:30:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 21:30:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-01-31 21:30:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 244 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2022-01-31 21:30:13,252 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 243 [2022-01-31 21:30:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:13,252 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2022-01-31 21:30:13,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.707142857142857) internal successors, (239), 139 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2022-01-31 21:30:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 21:30:13,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:13,253 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:30:13,254 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1507105313, now seen corresponding path program 75 times [2022-01-31 21:30:13,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033002317] [2022-01-31 21:30:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:13,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:13,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:13,330 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:13,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:13,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:13,387 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:13,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:14,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:18,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:18,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033002317] [2022-01-31 21:30:18,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033002317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:18,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 21:30:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828823981] [2022-01-31 21:30:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 21:30:18,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 21:30:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5260, Invalid=15046, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:30:18,448 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 143 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 142 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:31,275 INFO L93 Difference]: Finished difference Result 495 states and 506 transitions. [2022-01-31 21:30:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 21:30:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 142 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2022-01-31 21:30:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:31,276 INFO L225 Difference]: With dead ends: 495 [2022-01-31 21:30:31,276 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:30:31,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=15774, Invalid=64032, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 21:30:31,279 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 714 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19644 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 20503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 19644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:31,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 49 Invalid, 20503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 19644 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-01-31 21:30:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:30:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-01-31 21:30:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0160642570281124) internal successors, (253), 249 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 257 transitions. [2022-01-31 21:30:31,314 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 257 transitions. Word has length 248 [2022-01-31 21:30:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:31,314 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 257 transitions. [2022-01-31 21:30:31,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 142 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 257 transitions. [2022-01-31 21:30:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 21:30:31,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:31,315 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:31,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:30:31,315 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1342329562, now seen corresponding path program 76 times [2022-01-31 21:30:31,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:31,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210812707] [2022-01-31 21:30:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:31,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:31,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:31,376 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:31,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:31,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:31,448 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:31,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:32,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:38,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210812707] [2022-01-31 21:30:38,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210812707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:38,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:38,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 21:30:38,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643709200] [2022-01-31 21:30:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:38,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 21:30:38,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 21:30:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1264, Invalid=20788, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:30:38,335 INFO L87 Difference]: Start difference. First operand 254 states and 257 transitions. Second operand has 146 states, 146 states have (on average 1.7054794520547945) internal successors, (249), 145 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:51,201 INFO L93 Difference]: Finished difference Result 700 states and 710 transitions. [2022-01-31 21:30:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 21:30:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.7054794520547945) internal successors, (249), 145 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-01-31 21:30:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:51,204 INFO L225 Difference]: With dead ends: 700 [2022-01-31 21:30:51,204 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 21:30:51,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10059 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1773, Invalid=60477, Unknown=0, NotChecked=0, Total=62250 [2022-01-31 21:30:51,206 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 21948 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 22055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 21948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:51,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 535 Invalid, 22055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 21948 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-01-31 21:30:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 21:30:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-01-31 21:30:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.0111358574610245) internal successors, (454), 449 states have internal predecessors, (454), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 458 transitions. [2022-01-31 21:30:51,274 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 458 transitions. Word has length 253 [2022-01-31 21:30:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:51,274 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 458 transitions. [2022-01-31 21:30:51,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.7054794520547945) internal successors, (249), 145 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 458 transitions. [2022-01-31 21:30:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 21:30:51,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:51,275 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:51,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:30:51,275 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash 772028277, now seen corresponding path program 77 times [2022-01-31 21:30:51,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125429864] [2022-01-31 21:30:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:51,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:51,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:51,363 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:51,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:51,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:51,440 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:51,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:56,899 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:56,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125429864] [2022-01-31 21:30:56,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125429864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:56,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:56,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 21:30:56,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665940476] [2022-01-31 21:30:56,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:56,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 21:30:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 21:30:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5632, Invalid=16718, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 21:30:56,901 INFO L87 Difference]: Start difference. First operand 454 states and 458 transitions. Second operand has 147 states, 147 states have (on average 1.7074829931972788) internal successors, (251), 146 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:10,462 INFO L93 Difference]: Finished difference Result 703 states and 713 transitions. [2022-01-31 21:31:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 21:31:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.7074829931972788) internal successors, (251), 146 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 21:31:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:10,464 INFO L225 Difference]: With dead ends: 703 [2022-01-31 21:31:10,464 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 21:31:10,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24002 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=16601, Invalid=69541, Unknown=0, NotChecked=0, Total=86142 [2022-01-31 21:31:10,467 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 735 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 20783 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 20783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:10,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 40 Invalid, 21556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 20783 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 21:31:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 21:31:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2022-01-31 21:31:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 452 states have (on average 1.011061946902655) internal successors, (457), 452 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 461 transitions. [2022-01-31 21:31:10,548 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 461 transitions. Word has length 255 [2022-01-31 21:31:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:10,548 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 461 transitions. [2022-01-31 21:31:10,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.7074829931972788) internal successors, (251), 146 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 461 transitions. [2022-01-31 21:31:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 21:31:10,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:10,549 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:10,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:31:10,549 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -756347885, now seen corresponding path program 78 times [2022-01-31 21:31:10,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:10,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141183556] [2022-01-31 21:31:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:10,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:10,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:10,617 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:10,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:10,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:10,708 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:10,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:11,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:17,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:17,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141183556] [2022-01-31 21:31:17,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141183556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:17,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:17,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 21:31:17,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859925034] [2022-01-31 21:31:17,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:17,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 21:31:17,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 21:31:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=21638, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 21:31:17,818 INFO L87 Difference]: Start difference. First operand 457 states and 461 transitions. Second operand has 149 states, 149 states have (on average 1.7046979865771812) internal successors, (254), 148 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:31,169 INFO L93 Difference]: Finished difference Result 706 states and 715 transitions. [2022-01-31 21:31:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 21:31:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.7046979865771812) internal successors, (254), 148 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2022-01-31 21:31:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:31,171 INFO L225 Difference]: With dead ends: 706 [2022-01-31 21:31:31,171 INFO L226 Difference]: Without dead ends: 459 [2022-01-31 21:31:31,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10465 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1833, Invalid=62937, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 21:31:31,174 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 22794 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 22902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 22794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:31,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 545 Invalid, 22902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 22794 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 21:31:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-31 21:31:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2022-01-31 21:31:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 454 states have (on average 1.0110132158590308) internal successors, (459), 454 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 463 transitions. [2022-01-31 21:31:31,271 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 463 transitions. Word has length 258 [2022-01-31 21:31:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:31,271 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 463 transitions. [2022-01-31 21:31:31,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.7046979865771812) internal successors, (254), 148 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 463 transitions. [2022-01-31 21:31:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 21:31:31,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:31,272 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:31,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:31:31,272 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1493774248, now seen corresponding path program 79 times [2022-01-31 21:31:31,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:31,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356340648] [2022-01-31 21:31:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:31,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:31,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:31,354 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:31,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:31,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:31,422 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:31,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:32,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:38,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356340648] [2022-01-31 21:31:38,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [356340648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:38,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:38,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 21:31:38,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490460231] [2022-01-31 21:31:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:38,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 21:31:38,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 21:31:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1317, Invalid=21939, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:31:38,553 INFO L87 Difference]: Start difference. First operand 459 states and 463 transitions. Second operand has 150 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 149 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:52,224 INFO L93 Difference]: Finished difference Result 708 states and 717 transitions. [2022-01-31 21:31:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 21:31:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 149 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-01-31 21:31:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:52,226 INFO L225 Difference]: With dead ends: 708 [2022-01-31 21:31:52,226 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 21:31:52,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10617 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1841, Invalid=63951, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 21:31:52,229 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 23653 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 23762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 23653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:52,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 560 Invalid, 23762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 23653 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 21:31:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 21:31:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-01-31 21:31:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 456 states have (on average 1.0109649122807018) internal successors, (461), 456 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 465 transitions. [2022-01-31 21:31:52,309 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 465 transitions. Word has length 260 [2022-01-31 21:31:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:52,309 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 465 transitions. [2022-01-31 21:31:52,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 149 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 465 transitions. [2022-01-31 21:31:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 21:31:52,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:52,310 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:52,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:31:52,310 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1490905251, now seen corresponding path program 80 times [2022-01-31 21:31:52,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959121879] [2022-01-31 21:31:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:52,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:52,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:52,378 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:52,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:52,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:52,443 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:52,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:58,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959121879] [2022-01-31 21:31:58,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [959121879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:58,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:58,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 21:31:58,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373440590] [2022-01-31 21:31:58,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:58,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 21:31:58,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 21:31:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5914, Invalid=17648, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 21:31:58,212 INFO L87 Difference]: Start difference. First operand 461 states and 465 transitions. Second operand has 151 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 150 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:12,586 INFO L93 Difference]: Finished difference Result 711 states and 721 transitions. [2022-01-31 21:32:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 21:32:12,587 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 150 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 21:32:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:12,588 INFO L225 Difference]: With dead ends: 711 [2022-01-31 21:32:12,588 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 21:32:12,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25299 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=17444, Invalid=73458, Unknown=0, NotChecked=0, Total=90902 [2022-01-31 21:32:12,597 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 544 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21918 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 21918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:12,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 35 Invalid, 22504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 21918 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-01-31 21:32:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 21:32:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-01-31 21:32:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 459 states have (on average 1.0108932461873639) internal successors, (464), 459 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 468 transitions. [2022-01-31 21:32:12,695 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 468 transitions. Word has length 262 [2022-01-31 21:32:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:12,695 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 468 transitions. [2022-01-31 21:32:12,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 150 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 468 transitions. [2022-01-31 21:32:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 21:32:12,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:12,696 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:12,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:32:12,697 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 633058945, now seen corresponding path program 81 times [2022-01-31 21:32:12,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:12,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214750010] [2022-01-31 21:32:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:12,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:12,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:12,779 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:12,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:12,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:12,866 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:12,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:13,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:18,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214750010] [2022-01-31 21:32:18,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214750010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:18,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:18,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 21:32:18,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496422811] [2022-01-31 21:32:18,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:18,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 21:32:18,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 21:32:18,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6113, Invalid=18067, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 21:32:18,981 INFO L87 Difference]: Start difference. First operand 464 states and 468 transitions. Second operand has 153 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 152 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:33,791 INFO L93 Difference]: Finished difference Result 715 states and 725 transitions. [2022-01-31 21:32:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 21:32:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 152 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 21:32:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:33,793 INFO L225 Difference]: With dead ends: 715 [2022-01-31 21:32:33,793 INFO L226 Difference]: Without dead ends: 467 [2022-01-31 21:32:33,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26055 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=18036, Invalid=75294, Unknown=0, NotChecked=0, Total=93330 [2022-01-31 21:32:33,796 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 762 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22687 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 22687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:33,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 35 Invalid, 23489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 22687 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-01-31 21:32:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-31 21:32:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2022-01-31 21:32:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 462 states have (on average 1.0108225108225108) internal successors, (467), 462 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 471 transitions. [2022-01-31 21:32:33,864 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 471 transitions. Word has length 265 [2022-01-31 21:32:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:33,865 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 471 transitions. [2022-01-31 21:32:33,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 152 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 471 transitions. [2022-01-31 21:32:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-31 21:32:33,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:33,866 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:33,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:32:33,866 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:33,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2007823289, now seen corresponding path program 82 times [2022-01-31 21:32:33,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:33,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995345545] [2022-01-31 21:32:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:33,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:33,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:33,928 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:33,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:33,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:33,996 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:33,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:41,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:41,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995345545] [2022-01-31 21:32:41,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995345545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:41,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:41,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 21:32:41,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637517807] [2022-01-31 21:32:41,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:41,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 21:32:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 21:32:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=23389, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 21:32:41,578 INFO L87 Difference]: Start difference. First operand 467 states and 471 transitions. Second operand has 155 states, 155 states have (on average 1.7032258064516128) internal successors, (264), 154 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:56,109 INFO L93 Difference]: Finished difference Result 718 states and 727 transitions. [2022-01-31 21:32:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 21:32:56,109 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.7032258064516128) internal successors, (264), 154 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-01-31 21:32:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:56,110 INFO L225 Difference]: With dead ends: 718 [2022-01-31 21:32:56,110 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 21:32:56,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11301 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1956, Invalid=68004, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 21:32:56,113 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 24753 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 24865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 24753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:56,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 570 Invalid, 24865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 24753 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-01-31 21:32:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 21:32:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2022-01-31 21:32:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 464 states have (on average 1.0107758620689655) internal successors, (469), 464 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 473 transitions. [2022-01-31 21:32:56,182 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 473 transitions. Word has length 268 [2022-01-31 21:32:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:56,182 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 473 transitions. [2022-01-31 21:32:56,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.7032258064516128) internal successors, (264), 154 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 473 transitions. [2022-01-31 21:32:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 21:32:56,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:56,184 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:56,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:32:56,184 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1159593548, now seen corresponding path program 83 times [2022-01-31 21:32:56,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529791135] [2022-01-31 21:32:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:56,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:56,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:56,257 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:56,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:56,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:56,337 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:56,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:57,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:02,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:02,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529791135] [2022-01-31 21:33:02,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [529791135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:02,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:02,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 21:33:02,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019700806] [2022-01-31 21:33:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:02,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 21:33:02,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 21:33:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6266, Invalid=17914, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 21:33:02,281 INFO L87 Difference]: Start difference. First operand 469 states and 473 transitions. Second operand has 156 states, 156 states have (on average 1.705128205128205) internal successors, (266), 155 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:17,381 INFO L93 Difference]: Finished difference Result 737 states and 763 transitions. [2022-01-31 21:33:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 21:33:17,381 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.705128205128205) internal successors, (266), 155 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 21:33:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:17,382 INFO L225 Difference]: With dead ends: 737 [2022-01-31 21:33:17,382 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 21:33:17,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26123 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=18792, Invalid=76380, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 21:33:17,386 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 556 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23189 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 23189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:17,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 39 Invalid, 23582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 23189 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 21:33:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 21:33:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 276. [2022-01-31 21:33:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-01-31 21:33:17,441 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 270 [2022-01-31 21:33:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:17,441 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-01-31 21:33:17,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.705128205128205) internal successors, (266), 155 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-01-31 21:33:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 21:33:17,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:17,442 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:17,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:33:17,443 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash 343845773, now seen corresponding path program 84 times [2022-01-31 21:33:17,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:17,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633624849] [2022-01-31 21:33:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:17,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:17,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:17,521 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:17,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:17,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:17,593 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:17,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:18,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:23,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633624849] [2022-01-31 21:33:23,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633624849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:23,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:23,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 21:33:23,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437999642] [2022-01-31 21:33:23,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:23,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 21:33:23,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 21:33:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6734, Invalid=19348, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 21:33:23,914 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 159 states, 159 states have (on average 1.7044025157232705) internal successors, (271), 158 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:40,068 INFO L93 Difference]: Finished difference Result 763 states and 774 transitions. [2022-01-31 21:33:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 21:33:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.7044025157232705) internal successors, (271), 158 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 21:33:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:40,070 INFO L225 Difference]: With dead ends: 763 [2022-01-31 21:33:40,070 INFO L226 Difference]: Without dead ends: 495 [2022-01-31 21:33:40,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28202 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=19771, Invalid=81035, Unknown=0, NotChecked=0, Total=100806 [2022-01-31 21:33:40,073 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 791 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24643 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 24643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:40,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 34 Invalid, 25478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 24643 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-01-31 21:33:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-31 21:33:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2022-01-31 21:33:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.010204081632653) internal successors, (495), 490 states have internal predecessors, (495), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 499 transitions. [2022-01-31 21:33:40,162 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 499 transitions. Word has length 275 [2022-01-31 21:33:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:40,162 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 499 transitions. [2022-01-31 21:33:40,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.7044025157232705) internal successors, (271), 158 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 499 transitions. [2022-01-31 21:33:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 21:33:40,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:40,164 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:40,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:33:40,164 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1719936635, now seen corresponding path program 85 times [2022-01-31 21:33:40,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:40,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69893923] [2022-01-31 21:33:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:40,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:40,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:40,239 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:40,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:40,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:40,315 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:40,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:41,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:46,696 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69893923] [2022-01-31 21:33:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [69893923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:46,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:46,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 21:33:46,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145711115] [2022-01-31 21:33:46,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:46,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 21:33:46,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 21:33:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6945, Invalid=19787, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 21:33:46,699 INFO L87 Difference]: Start difference. First operand 495 states and 499 transitions. Second operand has 161 states, 161 states have (on average 1.7018633540372672) internal successors, (274), 160 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:03,096 INFO L93 Difference]: Finished difference Result 767 states and 777 transitions. [2022-01-31 21:34:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 21:34:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.7018633540372672) internal successors, (274), 160 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 21:34:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:03,108 INFO L225 Difference]: With dead ends: 767 [2022-01-31 21:34:03,109 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 21:34:03,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28998 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=20398, Invalid=82964, Unknown=0, NotChecked=0, Total=103362 [2022-01-31 21:34:03,111 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 571 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 25156 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 25772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 25156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:03,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 49 Invalid, 25772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 25156 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-01-31 21:34:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 21:34:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2022-01-31 21:34:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 1.0101419878296145) internal successors, (498), 493 states have internal predecessors, (498), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 502 transitions. [2022-01-31 21:34:03,198 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 502 transitions. Word has length 278 [2022-01-31 21:34:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:03,199 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 502 transitions. [2022-01-31 21:34:03,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.7018633540372672) internal successors, (274), 160 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 502 transitions. [2022-01-31 21:34:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 21:34:03,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:03,200 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:03,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:34:03,200 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1042221789, now seen corresponding path program 86 times [2022-01-31 21:34:03,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:03,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335176658] [2022-01-31 21:34:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:03,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,274 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:03,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,342 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:03,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:04,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.